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.

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.

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.

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.

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.

What are dash vents and where are they located?

Dash Vents What are dash vents and where are they located? The dash vents are the last stop for air that flows through your heating and A/C system. These include all the interior vents in the dashboard that blow air onto you and your front seat passengers, as well as the vent below the windshield for defrosting.

Why are my front vents on my Chevy Trailblazer not working?

Recently my front vents stopped working on my 2004 Chevy Trailblazer. I’ve tried to recalibrate by taking out the fuse, waiting a couple minutes, putting the fuse back in, turning the car to run, letting it go through its motions, but that didn’t work. The air blows cold, but it is only coming out at the feet, side vents and defrost.

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.

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.

Why does my S-10 blow air out of the dash?

Under the hood, I found a vacuum hose that was rotted away. A 1/4 inch hose that runs from the vacuum module to the other side of the engine comp’t. Easy fix. Double check all of the vacuum lines under the hood before ripping apart your dash. My 2000 s-10 will not switch air flow to the floor. I have defrost and top-vent, but not Floor.

Is there a vacuum in the blend air door?

Vacuum operated the blend air doors. A cable operates the temp door only on the first gens. There is more than one area to check the vacuum source from the engine to the switch. Those non clear cut answers tell you the places to check.

Why does my S-10 blow air to the floor?

A 1/4 inch hose that runs from the vacuum module to the other side of the engine comp’t. Easy fix. Double check all of the vacuum lines under the hood before ripping apart your dash. My 2000 s-10 will not switch air flow to the floor. I have defrost and top-vent, but not Floor.

What kind of HVAC does a 2002 S10 have?

2002 S10 HVAC stuck in vent mode. 2002 S10 ZR2 pickup. 4.3 4WD. 123,000 miles. Manual HVAC controls. No CEL and no driveability issues.

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.

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.

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.

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 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…

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.