Why does my GMC Sierra 1500 blow hot air?

The AC on my 2005… The AC on my 2005 Sierra blows hot air after it has run a while when it is above about 85F. Turnu=ining the AC off and on again has no effect, but turning the whole engine off then restarting after about 30 seconds gets the ac cold again, but only for a few minutes.

Is the Silverado 1500 AC blowing cool air?

I have a 2001 Silverado 1500 with the 4.8L engine. The AC works fine but the heater only blows cool air. We just replaced the thermostat and it still doesn’t work right.

Why does my car air conditioner blow cold then warm?

Any number of culprits could be causing your car A/C to blow cold then warm air, including: A Leak in the A/C System A small refrigerant leak is the most common reason a car’s A/C gradually loses its cool.

What should I do if my GMC Sierra blows cold?

If R-134a comes in contact with any part of the body severe frostbite and personal injury can result. The exposed area should be flushed immediately with cold water and prompt medical help should be obtained. R-134a is the only approved refrigerant for use in this vehicle.

Why does my GMC Sierra AC blow cold and then warm?

Basically, AC is cold for first 30 minutes of day, and then turns warm. I use to could turn the compressor off using the switch on the dash, wait a few minutes, then turn back on and it would cool down for 5 to 7 minutes then turn warm again. A never ending manual cycle through the day!

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.

When did my GMC Sierra air conditioner stop working?

I had a 2001 GMC Sierra that did this when truck was less the one year old (summer of 2001 is when it was). The dealer had the truck in the shop idling for a long time and the A/C worked perfectly. I told them to take it for a ride and see. So the service manager in an effort to convince me nothing was wrong went for a ride with me driving.

What should the ambient temperature be in a GMC Sierra?

Install the J 43600 ACR 2000 Air Conditioning Service Center. The ambient temperature must be at least 16°C (60°F). Do not induce additional air flow across the front of the vehicle during the test. Record the ambient temperature displayed on the J 43600.

What causes AC to blow cold then warm on Dodge Ram?

Repair Topics > Air Conditioning Symptoms… > AC blows cold then warm… Dodge Ram 1500 intermittent AC, Compressor quits, blows cold, then warm, warm AC

Is there an air conditioner problem in a 2014 Chevy Silverado?

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated that the air conditioning unit emitted hot air inside the vehicle. There were no warning indicators illuminated.

Why does the AC blow cold air when the car is moving?

My car has an automatic transmission. When the car is moving, versus stopped, there is more air flow over the condenser (the heat exchanger in front of the radiator) and that airflow is essential to system operation. To maintain airflow when the car is in stop and go traffic, or is completely stopped, condenser fans will come on automatically.

Is the Chevy Silverado’s air conditioner blowing cold?

It is entirely possible for your Silverado’s heater to work just fine even when the air conditioner is not blowing cold at all. That’s why troubleshooting the air conditioner is totally different than troubleshooting the heater.

Why is the air conditioner blowing in my Dodge Ram 1500?

While parked the AC was blowung warm air, so I checked this fan on the driver side next to the radiator and it was not running. Turned off the ignitiin, gave the fan a couple of funger turns, wigled the cinecting wire harness and cranked it back on.

Why does my air conditioner blow when the AC is on?

7 people found this helpful. In the 2008 it has a separate condenser and fan motor the fan should always run when the AC is on if not it will blow hot when idoling and cool off a little driving down the road and non condensables in the system will blow cold just not cold enough 6 people found this helpful.

What happens if the blower motor only works on high speed?

In other designs, the failure of 1 resistor means you lose only one speed. However, most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode.

Why does my GMC Sierra suddenly stop running?

Truck suddenly stops running, acting like it’s out of fuel. There is fuel in the gas tank and, I can hear the fuel pump when I turn the ignition on. Is there a fuse, or relay that is maybe causing this to happen?

How does a GMC Sierra 1500 fuel pump work?

The older model has steel lines coming off of the top of the pump to the frame rail and then connects to the frame steel lines with short hoses, you’ll need line wrenches and the ability to curse. The newer style has plastic tubes from the plastic pump casing and uses those quick connect fuel fittings and you’ll need the disconnect tool.

What’s the fuel pressure on a Silverado Sierra?

Fuel pressure is 61 psi when running and when is dies drops to 58 psi and holds. I did the Pass Lock reset thing (10 minutes 10 seconds three times) with no change. Not sure where to go next.

How long has my Silverado Sierra been running?

We have had it for about 9 mos and put about 7k on it. Last week it started randomly stalling/dying, most times starting right back up. Then it died on my son and wouldn’t start. NO engines popping up. When I got to it I tried to go through the basics of troubleshooting- Turned on key to listen for fuel pump, pump came on.

Why does my GMC Silverado have no crank?

This is a fix for a known electrical issue with the 2003-2007 C/K series GM Trucks where a bad ground causes multiple issues. Such as no start, no crank, intermittent no gauges, and sometimes the theft light would stay on, and the parking lights would stay on.

Why is my Silverado Sierra engine popping up?

NO engines popping up. When I got to it I tried to go through the basics of troubleshooting- Turned on key to listen for fuel pump, pump came on. Pulled spark plug to check for spark which it had however plugs were bad and the spark was orange instead of blue.

Why is my GMC Sierra air conditioner not working?

On a 03-07 Chevrolet/ GMC Truck with the Electronic Climate control, Removing and reinstalling the HVAC fuse, causing the electronic climate control to RESET seems to Remedy the condition in which no power is getting to the AC compressor clutch connector, thus causing the Air conditioner not to work. Will this last forever?

Why is the AC cold in my Chevy Tahoe?

From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. I have a 2001 Chevy Tahoe with the 5.3L engine. I have an odd issue with the AC and was hoping an expert can shed some light on the problem. When the truck is driving, the AC is ice cold.

Why does the AC blow warm air when idling?

I have a 2001 Chevy Tahoe with the 5.3L engine. I have an odd issue with the AC and was hoping an expert can shed some light on the problem. When the truck is driving, the AC is ice cold. However, when I am idling for a couple of minutes, the AC will start to blow warmer air. Almost as if the ac is turned off and only the blower is working.

Why is my air conditioning not working on my GMC Sierra?

While there are a variety of reasons your GMC Sierra 1500 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.

Where does the air come from in a GMC Sierra?

This 2005 GMC Sierra came in with the complaint that the air will only flow from the defroster vents, regardless of where it is commanded to. This Sierra has auto a/c controls and no floor mounted center console.

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.

Why does my 2005 Tahoe blow hot air?

My 2005 Tahoe hava AC giving hot air problem. AC would suddenly blow hot air just on the driver’s side while the passenger side still blew cold. The only way to correct it was to turn the car off and back on and then it would immediately start blowing cold again. This happens intermitently.

Why does my AC suddenly start blowing hot air?

I have a 2004 Yukon with 160000 miles and about a year ago the AC would suddenly blow hot air just on the driver’s side while the passenger side still blew cold. After a few weeks it then stating blowing hot air on both sides. The only way to correct it was to turn the car off and back on and then it would immediately start blowing cold again.

What kind of car blows hot air when a / C is on?

Re: Drivers Side blows hot air when a/c is turned on.. I have the same predicament. My 2005 Chevy Silverado 1500 is in good shape, minus the driver’s side vents. Hot air continuously blows out of the vents, even with the AC off.

What does drivers side blow when a / C is turned on?

SilveradoSierra.com • Drivers Side blows hot air when a/c is turned on.. : Climate Control – Page 2 Re: Drivers Side blows hot air when a/c is turned on..

Where is the hot air blower on the drivers side?

It is located to the right of the hump. If you loosen the 8mm screws that hold it in place, pull it off, then manually move the rod that turns the actuator. Re: Drivers Side blows hot air when a/c is turned on..

Why is the rear AC warmer than the front?

When the rear ac is turned on only, the air isn’t that cold. But when the front ac is turned on, the rear ac is blowing colder air out the vents. That’s because the rear AC by itself can’t turn the compressor on… The front AC has to be on for the compressor to turn on….

Why does my GMC Yukon blow hot and cold air?

A small servo motor that turns hot and cold air valve in the heater box. I pulled the small flat motor off and noticed the shaft was jammed and would not turn when i moved the temperature selector knob from hot to cold. I reached in and turned the air valve with my finger and verified that it was not stuck.

Where is the cold air heater on a GMC Yukon?

It was cold out and the heat would not work in the front only. Turned out that the blend door motor was dead. It is under the glove box at the passengers feet. A small servo motor that turns hot and cold air valve in the heater box.

Why does my GMC air conditioner stop working?

For about 5 miles the A/C worked normally till we hit a R/R and the bump made it stop blowing cold air and he was finally convinced. Back to the shop and 30 min later they found the problem. Turned out to be the low pressure switch, (under hood on bottom of small tank) it was corroded and causing a loss of electrical contact.

Why does my GMC Sierra 1500 blow hot air?