Why does AC stop blowing out the defrost vents?

After installing a new blower fan motor the ac would only come out the defrost vents. The factory vacuum check valve is very hard to get to. So i bypassed it. Now it is working like it should and ac comes out the dash vents. I do not have a vacuum reservoir installed i will have to see if i will need to add it later.

What does it mean when a car fan only blows defrost?

Fan Only Blows Defrost, Won’t Change To Floor Or Vent. Re: Air will only come out of the defrost vent! I had the same issue with my 2008 Silverado in that the air would only blow out of the defrost vent. I ended up taking it into a dealer and the scan revealed code B3779 – airflow mode actuator stuck.

Why are the vents on my GMC Sierra stuck?

The most common symptom of course is lack of control over the vent output position and normally it will be stuck in the defroster only position. If it is not currently stuck in the defroster position but you are changing the actuator anyways. make sure that you set the vent position to defrost before starting this procedure. You will see why later.

Where is the defrost vent on my car?

It is located above the driver side gas pedal. There is one vent tube that needs to be removed or pushed off to the side. There are 2 screws about 6mm and a small wiring harness to remove. It’s tricky to get to but not overly difficult with a trouble light and a small socket wrench with an extension.

What to do if your truck fan only blows defrost?

Honestly, don’t know if your control head has a built in recal feature, but a cheap way to find out. Re: Fan Only Blows Defrost, Won’t Change To Floor Or Vent. When you reattach the battery and crank the truck dont touch anything for five minutes. Then shut the truck off, crank it and see if its fixed.

Can a climate control fan only blow defrost?

SilveradoSierra.com • Fan Only Blows Defrost, Won’t Change To Floor Or Vent. : Climate Control Fan Only Blows Defrost, Won’t Change To Floor Or Vent.

Why are the air vents on my car stuck?

This can happens due to a surge or spike in the cars electrical system. Before going too far with any repairs it can be a good idea to remove the climate control fuse and allow the system to power down. When the fuse is reinserted it will allow the system to reset and regain its logic and start working again.

Why is no air coming out of my dash vents?

I can only get air to blow out of the defroster vents or the floor vents, no matter if i use heat or A/C. I have heard some people say it is probably a vaccum hose issue.

Can a flexible duct hose fit over an A / C vent?

The 1.5″ flexible duct hose is lined with metal which makes it harder to crush down in tight areas. If you have an aftermarket a/c system with oval hose adapter the duct hose will fit over it.

How does a heater change from Defrost to vent?

try and listen when you change over from defrost to vent. If you hear it trying to change over it is more than likely a small plastic clip the goes behind the lower not far from the heater core. It attaches a vaccum accuater to a small rod that attaches to the flap that changes the system over from floor, vent, to defrost.

I can only get air to blow out of the defroster vents or the floor vents, no matter if i use heat or A/C. I have heard some people say it is probably a vaccum hose issue.

Where is the defroster located in an air conditioner?

The defroster is part of the heater and air conditioner system which is housed inside of the heater plenum. The vent control system for the defroster in integrated into the operation of all temperature controls and uses forced air provided by the blower motor.

Why is my car a / C blowing hot air out of the vent?

Your car’s A/C system is one that operates a little differently than you might think. Instead of actually creating cool air, it instead removes the heat and moisture from the air inside of your car, leaving you with cooler feeling air.

Why does AC come out the dash vents?

The factory vacuum check valve is very hard to get to. So i bypassed it. Now it is working like it should and ac comes out the dash vents. I do not have a vacuum reservoir installed i will have to see if i will need to add it later. Don’t forget to like, comment, share and subscribe to my channel. Loading…

What to do if your air conditioner is blowing hot air?

If you discover this to be the reason why your car air conditioner is blowing hot air add Red Angel A/C Stop Leak to your vehicle’s air conditioning system to seal any leaks no matter how small they are before you recharge the system.

Is there air coming out of the vents?

The blower fan can typically be heard with no abnormal sounds, although no air seems to be making it out of the vents. We go over parts that need to be removed to gain access to replace a common failed component.

When does the AC in my van stop blowing?

The AC in my van stops blowing when i accelerate or the engine is under a load. Ford E150 Econoline: The AC in my van stops blowing when i…

What causes a defroster door to get stuck?

In some cases an electrical motor can burn out or the gears inside the actuator can break causing the defroster door to get stuck. A climate control system can stop working after a battery replacement as the control prompt of the system is lost and needs to be rebooted by removing the defroster/heater fuse for a period of time and then reinserted.

Why does my heater not change from defrost vents?

Re: Heater/ac will not change from defrost vents to any… Failure of mode and/or blend door operation most often tends to be vacuum supply issues. If there is no operation of the doors at all (switching from defrost-floor-vent) then verify vacuum supply on the vacuum line at entry of the firewall (it’s easiest to get to).

How does the air vent work on a defroster?

The vent control system for the defroster in integrated into the operation of all temperature controls and uses forced air provided by the blower motor. On newer cars the vent direction and temperature controls are operated by a series of 3 or 4 electrical actuator motors which are adjusted by the climate control module.

Why is there no air from the floor vents?

If its electric you may simply have a blown fuse or it could be a bad actuator, if its vacuum you would need to look for leaks in the system. which could be in the lines to the actuator or the actuator itself . Hope this helps Was this answer helpful? I have the same problem and actually there are 3 of those things.

Why does heat not blow from the floor?

If you have air flowing only through the vents with no defrost or floor, this door is failing.

Why does my Dodge Ram 1500 blow heat from the floor?

Dodge RAM 1500 Questions – Heat blows from vents but won’t blow from floor when put on floor mode… – CarGurus.ca You most likely have an air door actuator problem. It’s stuck in the vent position and can’t shift to the floor position. The two doors that governs flow between dash vents and defrost/floor are “mode door 1” and “mode door 2.”

What happens if I set the blower on high?

Acceleration does not affect it. If I set the blower on “high” or “Max AC” it will only blow out of the defrost vents. I suppose it could still be a vacuum leak.

Why does air not blow out the dash vents?

The air won’t blow out the dash vents. It blows out the floor vent and the defroster vent, but it won’t change and blow out the dash vent. Any one know what I need to do to fix this problem?

Why is the a / C not coming from the front vents?

The next day I Took to the shop asking them to check vaccum first, and that didnt seem to be the issue, after tests and inspection they tell me its either the in AC panel cluster itself ( part with the buttons on it. Which seems to be working fine, I see no problems, but idk) or it could be the A/C Control Computer.

Why are the vents not working on my Chevy Trailblazer?

When it fails and you disconnect the battery it probally just looses its position and has no idea where it is, rather then have no defrost, which is a saftey issue, it just defaults to floor and defrost. Mine was working fine until I pulled the a/c control unit out… Then no more center vents.

SilveradoSierra.com • Fan Only Blows Defrost, Won’t Change To Floor Or Vent. : Climate Control Fan Only Blows Defrost, Won’t Change To Floor Or Vent.

Is the Astro fan only blows defrost?

Re: Fan Only Blows Defrost, Won’t Change To Floor Or Vent. Yea the problem with them astro’s is the way the damn motor is crammed into the dog house with the heat it destroys the hard plastic vacume line . I have had 5 of them and every one had this problem until you change them out with rubber lines .

What to do if your GM fan won’t defrost?

See if this fixes the problem. Many of GM’s AC control heads have a built in reset feature that when power is removed and then applied it will go through a cycle that activates all the vent doors and mode doors. It’s worth a try.

Is there issue with auto climate control not changing from vent to vent?

Has anyone had an issue with the auto climate control not changing from vent to vent? Re: Fan Only Blows Defrost, Won’t Change To Floor Or Vent. Pull the negative battery cable and re-install, making sure it is very tight (also check the positive to make sure it is tight). See if this fixes the problem.

Why does my car have no air in the vents?

Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

Is there no air flow from the vents?

Chevrolet Express 2500: NO AIR FLOW FROM HEATING AND AIR THRU… NO AIR FLOW FROM HEATING… The fan switch works, you can hear air blowing but none comes out out of the fronts vents some thru the floor and some thru defrost. Experience: ASE Master Certification. GM World Class Certification Hello and thank you for trusting me with your question.

Why are the vents on my 1997 Ford Ranger not blowing?

Re: My 1997 ford ranger a/c dash vents won’t blow… Vacuum supply starts on the drivers side of the engine.

How to troubleshoot and repair vents low air flow?

Easy step by step guide one how to troubleshoot and repair vent low air flow, this article pertains to most vehicles. Step 1 – Most air control vents are equipped with a flow control door that is located at the vent outlet. This door is controlled by a thumb wheel that when activated will open and close the vent air flow door.

Why does air come out of the dash vents?

If system (fan switch) is off and I just have it on vent, the outside air mostly blows at your feet. Sometimes it will come out of the dash vents. If the a/c button is pressed in but fan selector is off the amber a/c light will be on sometimes or just flicker.

Why is my defrost vent not working on my truck?

Also, there is no light coming on when the AC button and/or the recirculating buttons are pushed. All fuses look good. When the AC button is pushed, it doesn’t appear to engage the compressor. What could be happening? Can’t drive around without defrost. Too dangerous. Thanks!

Is there no air from the dash vents?

I have a 1999 superduty f250 early diesel, the air only blows from the floor and defrost but not the dash vents. I have swapped over known good parts from my other diesel, I have changed the climate control, air pump, checked my vaccuum lines and watched the actuator moove on the air box, any ideas?

What does it mean when your a / C vents don’t switch?

When you turn on the defrost the A/C turns on automaticaly. If you mean that the air blows out of your “vent” air ducts when you turn on the A/C then you may have something stuck in your air duct plentum or a air duct plentum door is not working. This type of repair involves removing the entire dash board and air ducts to just find the problem.

Why does my a / C turn on when I Turn on the defrost?

Nothing, that is how the defrost works. When you turn on the defrost the A/C turns on automaticaly. If you mean that the air blows out of your “vent” air ducts when you turn on the A/C then you may have something stuck in your air duct plentum or a air duct plentum door is not working.

What are the two doors between the dash vent and the floor?

It’s stuck in the vent position and can’t shift to the floor position. The two doors that governs flow between dash vents and defrost/floor are “mode door 1” and “mode door 2.” Mode Door 1: This door regulates air flow to either the dash vents or defrost/floor.

Why are the vents on top of my car not blowing?

Q: Fan wont blow out top vents for defrost. after pushing defrost , fan vents on top of dash dont blow air My car has 84000 miles. My car has an automatic transmission. Hi there. Check the blend doors to the vents and see if they move when the switch is turned. If they do not move, then check for a vacuum hose to the blend door actuator.

What to do when your car fan wont blow out?

Check the blend doors to the vents and see if they move when the switch is turned. If they do not move, then check for a vacuum hose to the blend door actuator. If there is no vacuum on the actuator, then see if the vacuum hose has a leak in it. If the actuator is electronic, then check for power to the actuator.

Can a / C switch vents on its own under engine load?

Automotive Forums .com Car Chat > Ford > Windstar > Solution to A/C switching vents on its own under engine load. Solution to A/C switching vents on its own under engine load. The A/C system switches from vent to defrost mode under engine load (going uphill or overtaking another car).

Why are the vents on my Chevy Silverado not blowing air?

OK, trying to help my 82 y/o Dad figure out a problem he is having on his 2001 Chevy Silverado. The dashboard vents will not blow any air but the defrost and floor vents work fine. Not a blower motor issue, can be heard running.

Why are my dashboard vents not blowing air?

The dashboard vents will not blow any air but the defrost and floor vents work fine. Not a blower motor issue, can be heard running. Thought it could be a blin door issue but that seems to be more related to temperature control than what vent the air is discharged from.

What to do if your defroster wont blow out top vents?

If you need further assistance with defroster not working on top vents, then seek out a professional, such as one from Your Mechanic, to help you. The statements expressed above are only for informational purposes and should be independently verified.

What to do if your car fan wont blow out vents?

What to do when your a / C stops blowing?

If you don’t want to remove hoses or find locations hard to inspect or check, purchase a spray can of carb cleaner. Spray it over the canister or hard to reach vacuum locations to see if the engine speeds up from an idle. If it does, it indicates a leak as it sucked in carb cleaner. Be careful around hot headers- fire risk if you use too much.

Where is the mode actuator on a 1995 GMC c1500?

This 1995 GMC C1500 came in with the complaint that the air would blow from everywhere except the front vents. In using the controls, the air flow would adjust from the defrost to the floor. All other functions were okay as well. The mode actuator is located under the driver’s side of the dash, above the gas pedal.

Why is air not blowing out of my AC vents?

If the evaporator reaches 32 degrees for an extended period of time this condensate/water freezes. The ice will form a shield not allowing the air to be blown through, which could be the reason the air is not blowing out of the vents sometimes.

Why are the vents on my Dodge Ram not blowing?

You could turn the fan on, but no air would blow out any of the vents. Found out the problem was that the damper that moves to divert air from the vents to defrost, to the feet, etc. is controlled by vacuum. If the hose goes bad, the damper just closes and you can’t get air out from any of the vents.

Why is my AC and heater not blowing air?

The blower fan located behind the dashboard pushes air through the climate control vents. If the heater isn’t blowing hot air at you when you turn the system on, the blower fan might have a problem. Either it’s not getting electrical power or, more likely, the motor itself has simply burned out.

Why is my car AC fan not working?

Another reason why your car AC fan is not working could be due to your cabin air filter. Cabin air filters serve as a filter to the outside air coming into your car to make sure it is clean and not filled with contaminants. However, if this air filter isn’t changed,…

What to do if your car AC is not blowing?

Depending on what kind of car you have, it should be a pretty simple fix. The problem sounds like it is with your blower motor, not your AC system. Hopefully, the blower motor simply blew a fuse. Find your fuse panel and check the fuse for the “blower motor” or “vent fan” or something like that.

Why is my central air conditioner fan not working?

Air Filter is Blocked. Another common and easily remedied situation that sometimes results in a central air conditioner fan not working is a dirty, clogged air filter. Your system’s air filter traps dust, dirt and other airborne pollutants to keep indoor air and internal cooling system components cleaner.

Why do you need a defroster on an air conditioner?

You need a defroster to see where you are going. The defroster is part of the heater and air conditioner system which is housed inside of the heater plenum. The vent control system for the defroster in integrated into the operation of all temperature controls and uses forced air provided by the blower motor.

Why is the TEM switch stuck in defrost?

Fan motor works fine, Tem switch works fine, but the other is stuck blowing out in defrost no mater which vent you turn to. I am trying to determine if it is the HVAC control module or the MODE actuator? before i buy any parts. Dealer wants 110.00 to Diag truck. Wants 1.5 hr labor to fix it, and the module is 324.00 at the Chevrolet dealer.

What to do when your AC only blows out?

You may be able to manually help it get unstuck and lube the part it moves. Once you see it, turn the mode selector knob and watch the actuator move and get stuck, help it past that spot, lube and it may stay working for a while. chances are, it is just tired.

Why do air vents need to be replaced?

Actuator Replacement The climate system is responsible for controlling the position of the defroster actuator which is connected to the air position door in the heater plenum. This actuator controls defrost, middle and lower air vents. When it fails it can do so in the defrost position and must be replaced.

Why are the air vents on my car not working?

If you can hear a hissing sound when the car is running from under the dash then vacuum is escaping. This kind of system also uses a check valve which will allow the vent system to engage the defroster when travelling up a hill when engine vacuum is low.

Why is air only comming out of the windshild defrostor?

Check carefully all the rubber elbows,tees and plastic lines for cracks/splits any sort of a vacuum leak in this area COULD cause your issue. Does your cruise work? i ask because if memory serves one of the two lines at the check valve go to the cruise and the other to the climate control.

How do I stop no air from dashboard vents?

This door is controlled by a thumb wheel that when activated will open and close the vent air flow door. Work the thumb wheel from one side to the other while checking the airflow. The flow should stop and start again, if the thumb wheel does not make a difference the problem is somewhere else.

Are there any vents that blow hot air?

The dash vents are the only vents that work. It blows hot air so I don’t think there is anything wrong with they heating system. There is just no air from floor vents or defroster. Years ago this was controlled by vaccum lines, but now everything is electronic. Any ideas? Is this a good question?

Are there any vents in the dash that work?

I have a 2007 Dodge Grand Caravan. The dash vents are the only vents that work. It blows hot air so I don’t think there is anything wrong with they heating system. There is just no air from floor vents or defroster.

Why is my a / C not working in my Ford van?

Rear A/C not working correctly. Hot air blows out of the lower vents along the side wall no matter what position the control selector is in. Vent blows heated air. A/C blows heated air. Heater blows heated air. All out the lower vents. Nothing out the upper (ceiling) vents, even when A/C is selected. The rear blower works and changes speed.

Is the a / C pump on the front of the Van?

A/C pump and front vents blow cold air but not the rear air. Also felt the a/c lin … read more 1999 E350 Econline Van with rear heat/ac- Air flow does not go to ceiling vents when switched to AC in front.

Why is my Refrigerator fan not blowing air?

It may be faulty and “telling” the control board that the fridge temp is OK when it is not and the damper (part #429) is being closed to prevent more cold air coming into the fridge section. If you have a DMM (digital multimeter) and know how to use its’ Ohmmeter function you can test the sensor to check if is OK.

Can a defrost fan blow to the floor?

Fan Only Blows Defrost, Won’t Change To Floor Or Vent. I discovered today that I only receive air through the defrost vents. tried to change it to the floor or the dash vents, no deal.

Is there another for the defrosters up under the dash?

I have a 1998 K 1500 and air only blows out of the defrosters and not the heater. Bottom blend door actuator has been replaced and this is not the problem. Is there another for the defrosters up under the dash?

Why is there no air through the vents?

About 4 weeks or so before I started noticing an issue with the air through the vents I noticed that the vacuum pump had been running after I turned the truck off, it doesn’t do it anymore, normal? Passanger side fire wall over the valve cover. Black cylinder with a plastic nipple. The gray hose with black rubber tip goes on the nipple.

When does a Ford car default to defrost?

It defaults to defrost when the motor/vacuum that turns the vents fails. Its vacuum controlled. The vacuum lines are under the hood, but I have no idea where. Passanger side fire wall over the valve cover. Black cylinder with a plastic nipple.

Is the AC blowing out of the vents?

The main vent of the vents that faces the passengers blows out nothing. The speed of the ac works. The heat also works. I check my cabin filter, replace the ac control knob or panel and still nothing works. when changing from ac blowing to the face and leg to defrost u can here it switch but no ac comes out of the front vents.

How does the climate system control the defroster?

The climate system is responsible for controlling the position of the defroster actuator which is connected to the air position door in the heater plenum. This actuator controls defrost, middle and lower air vents. When it fails it can do so in the defrost position and must be replaced.

How to fix a blow out front dash vent?

Take it out and give it a good dusting. Should clear out nicely. Look for the unplug vacuum cord by the passenger side…then look for the thing that looks like a plunger by your front window… and plug them to things back up….it should blow then…if not you’ll need more 134a or your AC compressor is not spinning….

Why does my AC heater default to defrost position?

Sounds like the main problem is a vacuum leak. When you loose vacuum the ac/heater will default to the defrost position. Check for vacuum leaks first. Get a copy of the appropriate sections of the shop manual. It should have a schematic that describes the flap positions at the different control positions. I also suspect it’s a vacuum issue.

What causes air vents to stay in defrost position?

If you have an older car then the defroster system is controlled by using vacuum supplied by the engine. Lift the hood and inspect the vacuum hose or tube that leads from the intake manifold to the passenger’s side firewall. The image below shows a typical line break which causes the vents to stay in the defrost position.

Why does my car AC blow cold air then blow warm air?

But that cold air turns warm fairly soon after because the high side pressures build to the point that the high pressure switch shuts off the compressor clutch. Once pressures equalize, the high pressure switch allows the compressor to start up again. The cycle repeats over and over, providing a short period of cold air, followed by warm air.

What to do when your car AC is running?

Check the radiator fans to make sure at least one fan turns one when the AC is switched on. However, some cars operate both fans at low speed while driving and switch into high speed mode when the AC is running. So get tricked into thinking your fans are ok simply because they’re running.

Where does the air conditioner blow out the vents?

(Fuses have been checked, and the battery has been disconnected and reinstalled) My heating and A/C only blows out of the floor and top vents. Does not blow out of front vents. When the heat is on the vents become cold and warm. Heat and Air conditioning only bloe thru the floor vents and defroster, not thru dash vents! Totally sucks!

When does a 2003 Ford F150 blow on defrost?

Ford F150 Lariat 2003 ford f150 a/c blows on defrost when… 2003 ford f150 a/c blows… 2003 ford f150 a/c blows on defrost when i accelerate works fine in the driveway no matter how much i accelerate. the vacuum lines on the control head appear to all be hooked up and in good shape.

Can a / C only blow out of defrost vent?

Problem is no matter what setting I put it on it still blows out of the windshield defrost vents. Has anyone had this problem before?

Can you change an A / C stuck on the floor?

A/C stuck on floor and defrost will not change on any set… I won’t change off defrost/floor setting I replaced the blend door actuator and did not seem to help it

Why does my car not change off defrost?

I won’t change off defrost/floor setting I replaced the blend door actuator and did not seem to help it My car has 56000 miles. My car has an automatic transmission. Hello. You need to see if the mode door actuator is working. This actuator is on the evaporator case on the driver’s side above the gas pedal.

Is there any heat to feet or defrost?

No heat to feet or defrost. Before replacing Heater Control Unit, it would only blow hot air from front vents- With this replacement it will now change from cold to hot and the air flow pressure does change from the front vents when changing the setting dial but there is still no air at all to feet and defrost.

Where does the vacuum vent go on a 1996 Dodge Ram?

I had same issue with 1996 Dodge. Look at your vacuum hose dia. find the hose that goes to heater controls and install another check valve. Also not a bad idea to check your intake vacuum with a gauge and see what your engine is producing for vacuum.

Why does my Dodge Ram 1500 not defrost?

15 people found this helpful. The final solution to my 1997 Ram 1500 – 5.9L air conditioning going to defrost on partial acceration – and – the cruise not performing well, was finally traced to a break in the hard plastic line going to the cruise head. Noting to do with my dash controls.

Why is the air only blowing through the front vents?

The air only blows through the front defrost vents, the back air works fine. What could that be? have the same problem? Check for a vacuum leak see picture and look at the vacuum motors see if they are getting vacuum when put on defrost/floor etc..

Why does my air conditioner blow cold air?

The air conditioner blows cold air but switches from front vent 2 floor 2 defrost vent simultaneously. None stay on very long they just keep switching back and forth. Do I need to get AC checked or what?

Why are the vents on the front of my car not working?

It tends to get choked over time, especially given that it pulls all the air from the front/engine compartment. You will see a lot of cooling but no air. Or it could be the 2 vents are blocked due to some debris clogging the passage to these 2 vents.

Where are the vents on a Ford van?

The vents that are on the front of the dash, the ones you can adjust to hit you, they “sometimes” work. I bought the van last week. They told me the A/C did not work, but it did, for a few days.

How does the defroster system work on an older car?

Where do I replace the resistor on my blower motor?

To repair the problem, simply replace the resistor block. It’s usually located in the ductwork (to keep the coils cool) below the glove box. Unplug the electrical connector, remove the screws and replace the unit. Replacement blower motor resistor blocks are usually available from any auto parts store or the dealer.

How to fix Ford AC defrost only-vacuum vent leak?

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Can a Ford F350 heater change to any other vents?

Heater/ac will not change from defrost vents to any other vents on my Ford F350. AC works but comes out of defrost only Clicking this will make more experts see the question and we will remind you when it gets answered. You can’t post conmments that contain an email address. An expert that got 10 achievements. An expert that got 5 achievements.

Why is my Ford F-250 stuck in defrost?

The suction system not only controls air zone valves, but also 4X4 activation. Typical vacuum leaks, like old lines are often the problem, but there is one last component that everyone participating on automotive help forums fails to mention when troubleshooting this trouble prone system, the electric vacuum solenoid valve. Loading…

Why does my Ford truck have no air?

Our trucks are also notorious for the Auto hubs not engaging 4×4 because of vacuum. The vac lines run all the way to the front hubs. Those lines will degrade and cause these issues also. The hubs say auto/lock on them.

What to do if your Ford van is stuck in defrost?

Save $1000 Ford Van AC Stuck in Defrost During Acceleration – Fixed! – YouTube Save $1000 Ford Van AC Stuck in Defrost During Acceleration – Fixed! If playback doesn’t begin shortly, try restarting your device.

What to do if your Ford vent control is stuck?

Ford Vent Control Stuck on DEFROST? Here is how to FIX it. Simple Hack to save Money! – YouTube

Where does the vacuum line from the defroster go?

Vacuum lines travel from the vacuum control switch on the dash to vacuum servos under the dash. These servos move the air doors which turn on and off the defroster. If you can hear a hissing sound when the car is running from under the dash then vacuum is escaping.

What to do when your air conditioner is not blowing?

Turn the air conditioner on or what ever is not working and pull line off and put your finger over it to see if it has vacuum if it does then reinstall line to see if vacuum motor will move the door. helpful?

Why does my Ford heater have no heat?

The Ford Heater temperature control issue comes down to this: A problem with the variable resistor inside the blend door actuator, in which case you must replace the actuator or, A problem with the blend door actuator motor, in which case you must replace the actuator or, A problem with a binding or stuck blend door. the blend door by hand.

How to change the defrost vent on a car?

Just Follow the plastic vacuum line which comes out of the pass side top rear of motor close to the alternator. You can easily see it once you pop the hood. Follow it over the brake master cylinder and then going to the front of the motor. Be careful not to pull on the vacuum lines too hard as they are brittle and crack very easily .

Where is the vacuum hose on a 1999 Ford E150 van?

This 1999 Ford E150 van came in with the complaint that the a/c would only blow out of the defroster. The mode actuators in this vehicle are vacuum controlled so checking vacuum is the first point in the diagnostic routine. There is a vacuum hose splice connector under the hood on the passenger side of the vehicle.

What kind of car wont blow out the vents?

AC wont blow out of vents. 2003 Ford E150, E250, E350. Ford F150, F250, F350, 1997, 1998, 1999, 2000 – YouTube If playback doesn’t begin shortly, try restarting your device.

What to do if your car fan wont defrost?

If there is no vacuum on the actuator, then see if the vacuum hose has a leak in it. If the actuator is electronic, then check for power to the actuator. If there is power and a ground circuit, then the actuator needs replaced.

How to know if your AC unit needs to be defrosted?

1 Your AC system isn’t reaching the desired thermostat setting 2 The air blasting from the air registers feels warm 3 Your electric bill is higher than usual 4 Water leaking around the AC 5 Hissing or bubbling noise 6 Condensation and moisture around the air handler 7 AC coils are encased in ice 8 Ice is visible outside the AC unit

Why do you need a blower fan in an AC unit?

The blower fan helps to ensure balanced air circulation within the air conditioning unit. Typically, as the air cools inside the AC unit, it becomes denser and doesn’t circulate well within the house. The blower fan pushes hot air from your space, allowing the cooler denser air to circulate freely within the room.

What does it mean when your AC unit freezes?

As a result, the refrigerant’s temperature falls below 32 degrees F, causing the evaporator coil to get too cold. This makes the air moisture to freeze and accumulate on the coil. The buildup of ice and frost on your AC unit is a surefire sign that your air conditioner is not operating correctly.

Can a 2012 F150 air conditioner only blow cold air?

The defrost setting isn’t working, air comes out … read more I have an F150 2012 Lariat Supercrew 5.0L that the air conditioning heating only blows through the defrost. The drivers side only blows cold … read more

Where does the air flow in a 2012 F150?

I have a 2012 f150. The air will only flow through the dashboard vents but not the floor or defrost….it is stuck on I have a 2012 f150. The air will only flow through the I have a 2011 f150 lariat with navigation. Regardless of the

What kind of air conditioner does an F150 have?

I have an F150 2012 Lariat Supercrew 5.0L that the air conditioning heating only blows through the defrost. The drivers side only blows cold … read more I have a 2011 f150 lariat 4×4. I am not getting air through I have a 2011 f150 lariat 4×4.

How to open the vents on a Mercedes Benz?

cheap fix for now… remove the under dash on the passenger side – you will see two bellows in the console, pull the one closest to the firewall toward the passenger side, then pull down, this will manually open the dash vents. disconnect the vacuum line from the bellow and cap it. this will give you dash AC until you remove the dash.

Why does my C280 blow air from the vents?

My C280 seems to have developed a bad actuator motor MB calls it a stepper motor in the plumbing vent work. All air blows from defrost and side vents.

The AC in my van stops blowing when i accelerate or the engine is under a load. Ford E150 Econoline: The AC in my van stops blowing when i…

Why does my Ford RV stop blowing cold air?

That is my V10 Ford rv that stop blowing cold air from the ac going up good size hill. This is a big problem when traveling in the summer months. The engine has lots of excess power and I want to eliminate the “Normal operation.

When does the a / C stop working in a Ford?

Ford E-Series Questions – A/C quits working when engine is under load. – CarGurus A/C quits working when engine is under load. When accelerating, my A/C stops blowing and only sometimes resumes blowing when a fairly low speed is attained. At highway speeds, it practically never runs.

What should I do if my rear defroster is blowing?

If there is no power to the switch, then check the fuses and see if any of them are blown. The rear defroster has a blend door that opens and closes that is electronically. If the fuse is blown, either the switch has failed or the blend door motor has failed.

What to do if your car’s AC is not working?

Check the vacuum lines to the engine and see if any of them are broken, has a hole, or is disconnected. Check the vacuum hose on the blend door and see if it has came off or broke. For the rear defroster, check the switch to the defroster and make sure that it has power to it and power coming out.

Why did my F-150 blend door actuator go out?

If you switch it towards heat a little bit, and the noise stops, your F-150 blend door actuator has gone out. A common issue in these trucks is the failure of the potentiometer that senses when the actuator has turned fully.

What does the blend door do on a Ford F-150?

A Ford F-150’s blend door is the device that controls how much heat or AC comes through the HVAC system. For the last 20 or 30 years in these trucks, they have been prone to failure. I love my truck, but I wish Ford had fixed this problem by now.

Where is the HVAC fuse on an F-150?

Pull the HVAC control fuse in the box in the passenger kick panel (pictured) for a minute with the engine off and key removed. This fuse is #15 on older trucks, but was #42 on mine. Check your manual for the right one, the manual labels it “climate control”.

Why does my Ford F150 have a bad smell?

The evaporator is always wet when the AC is in use. If the drain under the evaporator gets plugged, then water can sit in your plenem and breed nasty stuff. One of the primary jobs of an a/c system is to remove moisture from the air before that air comes into the cabin of the vehicle.

Where does the a / C come from in my car?

IF your car uses vacuum for mode control, check the line that comes from the throttlebody or intake manifold to the upper passenger side of the firewall – a vacuum control line. Problem started after a trip to south florida it was blowing on and off out of the vents but weak.

Why is the exhaust sensor sticking on my Ford F150?

Sticking exhaust gas recirculation sensors cause idling engines to run roughly in the Generation 12 Ford F150 model. Accumulation of carbon will cause the sensors to stick. Ford recommends changing the sensors every 100,000 miles.

Why is my a / C not working on my Ford E-150?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Ford E-150 has air conditioning problems?

Where does the vacuum go in a Ford E series?

There’s a black plastic vacuum tube from the intake that runs along the top of the engine on the right side. There is a Check Valve a Tee, and a vacuum reservoir. One end of the tee goes to the reservoir and the other through a grommet through the firewall to your AC controls.

How can I keep air from coming out of my vents?

Another way to prevent common home cooling problems is to clean your AC registers on a regular basis. Also known as vents, registers are the metal grates that let air flow from the AC ductwork into the rooms of your home. Vacuum these grates once a month, or anytime you see that dust has accumulated on them.

Why are the vents in my house not working?

One way to balance out the air flow to all the rooms in your house is to close the vents in the cooler rooms partway. This forces more air to the warmer rooms that aren’t receiving as much cold air through the vents. Another possibility is that something is blocking either the register from the inside or the ductwork that leads to the register.

What causes a fuse to blow on a blower motor?

If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.

What happens if you have a bad blower motor?

The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. Without it, the AC system will not be able to circulate any heated or cooled air.

What causes a bad or failing blower motor relay?

Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…

What are common reasons my Ford Edge has air conditioning problems?

What are common reasons my Ford Edge has air conditioning problems? While there are a variety of reasons your Ford Edge air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

What does it mean if your blower motor is not working?

Average rating from 849 customers who received a AC is not working Inspection. The blower motor resistor is an electrical component that is a part of the vehicle’s heating and air conditioning system. It is responsible for controlling the blower motor’s fan speed.

How can I tell if my blower motor resistor is faulty?

Another symptom of a faulty blower motor resistor is no air from the vehicle’s vents at all. Power to the blower motor is fed through the blower motor resistor, so if it fails or has any issues power can be cut off to the motor.

Is the air still coming through the defrost vents?

Air still coming through defrost, visually inspected lines going to hubs, look fine. The air coming through the defrost is AC if I put it on AC setting and not AC if I turn it to regular air. I haven’t had weather to see if the defroster setting would work, do you guys know if it would and could this vacuum issue compromise my 4hi or 4lo?

Why is my defroster not working on my car?

A control switch on the dash can fall apart allowing the vacuum to escape and not reach the servos. A defroster can also fade when traveling up a hill but then return once the grade is overcome which is a signal the vacuum check valve has failed.

How to repair a 2001 Ford F250 diesel?

In this video I will show you how to easily diagnose and repair the AC on a 2001 Ford F250 Super Duty 7.3 L diesel pickup this repair is also very comment on Expeditions and other vehicles including the gasoline engine so some things to check about when you’re pretty sure your AC is full but the compressor does not come on. Supported Vehicles ..

Why is my air conditioning not working on my Ford F-250?

The air conditioning system, or AC system, on your Ford F-250 should give you years of trouble-free performance. The AC system uses compressed refrigerant to cool the cabin when you turn the air conditioning on. If this system fails, it is normally due to a leak at the compressor.

Why does AC blow cool air through defroster vents?

No matter what setting it’s on, or speed, it all comes out the defrost vents. So if I turn the AC on it will eventually blow cool air through the defroster vents while I’m driving, if I come to a stand still the AC air coming through the defroster vents will not be as cool, more musty.

How does the heater work on a Ford F250?

At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core. At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. If the heater has stopped working in your F250, this process has failed in one way or another.

How to replace your Ford F-250 blend door actuator?

Here’s how to replace your blend door’s actuator and ensure you get hot and cold air when you want in your Ford F-250 or F-350 Super Duty. This article applies to the Ford F-250, F-350 Super Duty (2005-2014). The blend door actuator is responsible for controlling the hot and cold air mixtures in your Ford F-250 or F-350 Super Duty.

Where is the temperature controller on a Ford F-250?

Automatic Temperature Control-equipped dual zone trucks have two; the second actuator is low, located above the transverse air duct. Does the temperature controller work? The related article below provides instructions for testing the manual controller, a simple potentiometer.

Where does the air come from on a F150?

I have a 2012 f150. The air will only flow through the I have a 2011 f150 lariat with navigation. Regardless of the I have a 2011 f150 lariat with navigation. Regardless of the setting air only comes out the dash vents. The defrost setting isn’t working, air comes out … read more

Why is my Blend door not working on my Ford F-150?

If your Ford F-150 has heat on one side of the cab but not the other this is your problem. If the passengers don’t have heat it’s the blend door that’s the easiest to get to which is behind the radio. Couple of screws and you’re done. But like everyone else of course that’s not the one that breaks.

Why does my AC quit working on my Ford E-450?

Normal operation. When the load or the throttle position reaches a predetermined point the AC compressor will automatically shut off until the load or the throttle backs off then it will kick back in. 5 people found this helpful. So, I’ve also had this problem in an E-450 can on my class C motor home. Took it to Ford.

Why does a / C stop blowing through vents as I accelerate?

I was sitting stopped, turned on the A/C and it started blowing nice and cold as normal. After i started accelerating, the flow through the vents slowed and finally stopped. As it stopped, i heard the compressor kick into overdrive (like it does when it is cooling the air before blowing it through the vents right as you turn it on.)

For example, if the evaporator blower motor burns out, you will get little to no airflow through the vents. Most modern vehicles also have safety mechanisms that may prevent a component from engaging if the pressure is low in the system due to a refrigerant leak.

Which is the defrost position on a Mercedes Benz?

Usually, the default, no vacuum position is the defrost position. My guess would be it’s the vac reservoir that was described previously. I just repaired my center vent problem this weekend and what a PITA it was. Zade Faraj’s link With this post helped me start off.

Fan Only Blows Defrost, Won’t Change To Floor Or Vent. I discovered today that I only receive air through the defrost vents. tried to change it to the floor or the dash vents, no deal.

Is the AC blowing well through the vents?

The AC works but it does not blow well through the main vents. It seems to work fine on feet and window vents, but the … read more Vocational, Technical or Tra… Vocational, Technical or Tra… I have a 2006 Ford E-350 XLT that has low air flow at the front vents.

Why is my clubwagon Van not blowing air?

The blower motor is working fine, the squirrel cage … read more 98 Ford Clubwagon I have several issues with this van AC blowing system. First the fan don’t seem to blow as hard on max as it did unless I’m turning a street and then it does for a few second, second … read more Hi I have a 1998/99 Gullfstream 34′ Sun Sport with a Ford V10.

Why does the air stop blowing through the vents?

As it stopped, i heard the compressor kick into overdrive (like it does when it is cooling the air before blowing it through the vents right as you turn it on.) would this occur due to the air not being cool enough and it trying to cool it instead of blowing semi-warm air through the vents or is this possibly some sort of vacuum problem?

Is the AC blower on my Ford F150 shut off?

My 2013 KR has been doing this same thing for the last year and a half. I have had it in to the Ford dealership three times and most recently they replaced the blower motor. All was well for about two months but once it got hot again and the AC kicked on in high, it is back to its usual tricks.

Where are the vents on a car located?

Step 1 – Most air control vents are equipped with a flow control door that is located at the vent outlet. This door is controlled by a thumb wheel that when activated will open and close the vent air flow door. Work the thumb wheel from one side to the other while checking the airflow.

What should I do if my AC is not working on my Ford F-150?

Start by inspecting the condition of the cabin air filter on your F-150. Instead of changing it directly, it is often recommended to first clean the pollen filter. This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles.

Why is the air filter on my Ford F-150 not working?

If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturer’s recommendation. Start by inspecting the condition of the cabin air filter on your F-150. Instead of changing it directly, it is often recommended to first clean the pollen filter.

Why is the defrost not working on my GM Truck?

My airflow is stuck in the floor position no matter what setting is switched on the dash vent switch. I can’t get defrost or dash vent air to work. Fan settings do work. Also, there is no light coming on when the AC button and/or the recirculating buttons are pushed.

Why does my car air conditioner not defrost?

A malfunctioning blend door could close off the flow of heated or cooled air to the defroster. A mechanic can examine the system and identify the problem. If your refrigerant level is low due to a leak, it could keep your air conditioning system from producing enough dry air to defrost your vehicle.

What causes air to not come out of car vents?

A resistor essentially limits the output of the blower motor so that you only get as much air as you asked for. Clogged air intake: It’s also possible for an air intake to get clogged. Your car has two kinds of air intakes: fresh (air from outside of the vehicle) and recirculated (air from inside the vehicle).

Why does my defroster fade when I go up a hill?

A defroster can also fade when traveling up a hill but then return once the grade is overcome which is a signal the vacuum check valve has failed. If you are not sure which kind of system you have either vacuum or electronic any car made after about 1995 has an electronic system with no vacuum controlled vent door servos.

What should I do if my heater does not change from Defrost to vent?

If there is no operation of the doors at all (switching from defrost-floor-vent) then verify vacuum supply on the vacuum line at entry of the firewall (it’s easiest to get to). If no vacuum, trace the line back to the vacuum supply. You didn’t state if we’re dealing with gas or diesel engine.

Why does the a / C quit working on my Ford E-series?

One end of the tee goes to the reservoir and the other through a grommet through the firewall to your AC controls. The system is designed to hold vacuum whenever there is a high load demand (Climbing a hill, passing or taking off from a stop with a heavy load.)

The vents that are on the front of the dash, the ones you can adjust to hit you, they “sometimes” work. I bought the van last week. They told me the A/C did not work, but it did, for a few days.

Why does my air conditioner cut out when I accelerate?

Typically this occurs due to a bad vacuum check valve under the hood. During hard acceleration the AC door system loses vacuum, causing the doors to default to the windshield. This check valve keeps this from occurring. It is located under the passenger side of the hood.

What happens to the a / C vents while accelerating?

While accelerating the A/C vents in dash cut out. The vent goes to either defrost or the floor. I took this van to a mechanic, they smoke tested the vacuum lines.

Re: My 1997 ford ranger a/c dash vents won’t blow… Vacuum supply starts on the drivers side of the engine.

Where is the vacuum line on a Ford Ranger?

The white line controls the cabin air intake under the glovebox and the thermostat shutoff under the hood. It should only have vacuum when the switch is in a certian position, AC probly. The other three lines coming off the rubber manifold snake behind the dash vent door assemble and come out near the gas peddle.

Why is air blowing out of the vents on my Ford F350?

My 2004 F350 diesel started blowing air out of the defrost vents only. I’m wondering if something is simply stuck or if it’s a bigger issue? Some of these on newer vehicles have electric “actuators” which will “resynchronize” themselves when power is removed, then restored.

Why is my air conditioner not working in my Ford Expedition?

But my Fixed A/C stopped working again I took it to a new mechanic who after alot of trouble shooting found the problem. Which was again the Clutch Fan that was replace 10 days ago by the bad mechanic.

How much does it cost to replace an air conditioner in a Ford Expedition?

When the $125.00 service was done the trusted mechanic said that my A/C compressor was week and needed to be replaced (after charge blowing coldish) So I purchased a complete kit (not from ford but a good kit anyways) and had it replaced (parts and labor $1200)

When did the Ford Expedition air conditioner issue happen?

Discussion in ‘ 2nd Gen – 2003 – 2006 ‘ started by Jb14, Jun 19, 2013 . Hi Folks I am posting this in hopes that it can help you all not to have to go through what I had to for a year with and air conditioning issue with my 2005 Expedition.

What kind of air flow does 2006 F350 Superduty have?

Vocational, Technical or Tra… 2006 F350 SuperDuty Has a very weak air flow with the fan on high through all settings cold and hot. Hot is hot, AC is cold, just has weak airflow … read more Got an ’09 Ranger, the ac isn’t blowing like it should.

Where does the air come from in a 2002 F-150?

My 2002 F-150 AC air flow keeps switching back and forth between the “vent” setting and the “defrost” setting. It blows cold air just fine but I can’t really control which vents it comes out of.

Why is my Ford Ranger not blowing air?

I tore into the dash but could only get to the servo for the heat/cold blend door. I pulled the blower motor, which is working correctly, and cleaned out a wasp nest, dirt-dobber (?) nests, and assorted bugs and grass.

Why is the blend door not working on my Ford Ranger?

The blend door, which is working perfectly fine, shuts air flow to the heater core. It could be on fire and not effect the AC. The valve on the hot water line only closes in MAX AC and OFF. Again, more useful info. It didn’t make sense that that valve was the problem, but since there is a vacuum line on it…

Where does the a / C come out in a Ford Ranger?

But it makes no difference whether it is on Max, Normal, Vent, Defrost, etc., it only comes out through the defrost and floor vents. I tore into the dash but could only get to the servo for the heat/cold blend door.

What should I do if my AC unit is frozen?

In many cases, you may be able to defrost the ac unit yourself. You should avoid running the air conditioner if you think you have a frozen evaporator coil because this can place a strain on the compressor which could possibly cause damage and burn it out.

Why does my AC have a frozen coil?

While a frozen ac may be caused by malfunctions or damaged equipment, proper maintenance can help avoid some issues. Keep the evaporator coils clean, as dirty coils can restrict air flow across them. Replace your system’s air filters regularly.

What happens if your air conditioner freezes in hot weather?

Although, it may seem counter-intuitive for a system that’s used in the hottest weather to freeze, it can and does happen to many unprepared homeowners every year. A frozen air conditioner can leave you and your household in an uncomfortable situation on a hot day.

Why is air not blowing out of the dash vents?

A few different items can cause the air to not blow out of the dash vents. The most common are a blend door or a control switch.

What to do if your air conditioner is not blowing air?

The most common are a blend door or a control switch. The best method for the AC diagnosis feature can be found in the vehicles owners manual. I recommend having your AC checked by a qualified technician, such as one from YourMechanic, to have the problem diagnosed and repaired correctly.

Why does my car air conditioner not work?

After continuing driving for just another 5 minutes, I stopped to get gas. This took about 5 minutes. When I started the car, the A/C worked fine for the remainder of the 2 hour drive home. The most recent time this happened, it was after approx. 1 hour of driving.

A few different items can cause the air to not blow out of the dash vents. The most common are a blend door or a control switch.

Why does my car air vent blow cold on one side?

This situation can be caused by a bad blend door (also called air mix) actuator, a broken or binding blend/air mix door, broken linkage to the blend/air mix door, or a faulty HVAC control head or wiring harness. Car makers used to rely on cables to change the position of the blend door to regulate the amount of heat.

Can a car vent blow cold one side and hot the other?

In a vehicle with dual temperature controls you may encounter a situation where the vent blows cold one side, hot on other side or vice versa.

My C280 seems to have developed a bad actuator motor MB calls it a stepper motor in the plumbing vent work. All air blows from defrost and side vents.

Why is there no air coming out of my vents?

The most common cause of low air flow through the vents in your home is blocked or dirty AC filters. When your filters are blocked by furniture or clogged with dirt, dust, hair and other debris, it decreases the efficiency of your entire air conditioning system, greatly reducing its ability to cool your home effectively.

What to do if your air conditioner is not blowing?

Solution: Contact an AC professional to inspect your home’s ductwork. A dirty blower, above, can decrease the amount of air that comes through your AC vents. Your air conditioning system relies on a blower to pull in air from your home, run it over the evaporator coil, then push it back into your home as cold air.

Why is my AC only blowing through the defrost vent?

My AC is only blowing through the defrost vent and rear d… Q: My AC is only blowing through the defrost vent and rear defrost doesn’t work. My AC is only blowing through the defrost vent and the temperature control doesn’t do anything.

Where does the AC come from in a Toyota Tundra?

Ac only blowing through defrost vent and not coming out of the main front vents. Please help – 2007 Toyota Tundra Ac only blowing through… Ac only blowing through defrost vent and not coming out of the main front vents.

How to fix a frozen air conditioner unit?

How Do You Fix a Frozen Air Conditioner? 1 Examine the Vent Filters. Check the vent filters to see if they are clogged and restricting air flow. 2 Inspect the Coils and Fins. You can also inspect the coils and cooling fins around the evaporator to see if they need cleaning. 3 Check Coolant Levels. 4 Reset the Power.

Why does the AC only blow out the defrost vent?

Click to expand… Mode door actuator for where it’s blowing. Blend door actuator for hot/cold. These are more likely culprits than the control module in the front. The rear control module being bad is more common. How can I post this message for help?

Ford Vent Control Stuck on DEFROST? Here is how to FIX it. Simple Hack to save Money! – YouTube

Where is the a / C vent on a Ford?

It is usually located behind the glove compartment/under the dash. Take it out and give it a good dusting. Should clear out nicely.

What should I do if my AC vents are not working?

Again, regular AC maintenance is one of the best ways to prevent problems like air conditioner vents not blowing in one room of your house. A licensed and experienced HVAC professional can inspect all the ductwork and registers of your air conditioning system on a regular basis, ensuring the entire system is in proper working order.

What kind of AC does a Ford F-150 have?

I have a Ford F-150 1999. The AC works but it does not blow well through the main vents. It seems to work fine on feet and window vents, but the … read more

What should I do if my AC is not running?

These tips are also relevant if your AC is running but the air coming out of the vents isn’t cool, if there’s no air coming out of vents in one room or if you’re experiencing low air flow through the vents in your house. In short, no matter what specific AC problem you might be having, you should always make sure of the following first:

What is code b0263 on GMC Envoy?

This 2003 GMC Envoy came in with the complaint that the a/c will only blow out the defrost and floor. Not through the dash vents. I checked codes and found a code B0263 for a fault with the mode actuator. I first ran into this problem after changing a battery in one of these vehicles last year.