Why is the AC not working on my GMC Envoy?

Why is the AC not working on my GMC Envoy?

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 GMC Envoy has air conditioning problems?

What was the problem with my 2004 envoy?

2004 Envoy.. When turned on A/C or defrost engine would stall & cut off. I turned off A/C or defrost, cranked & ran fine as long as both were off. Took to shop; had throttle cleaned.

Why does my GMC Envoy stall while driving?

My 2004 GMC Envoy vibrates when I turn the air conditioner or heater on . It stalls while I’m driving it and it scares me and makes me think that I’m going to break down . I just put a brand new battery in and it still stalls .

What to do if your air conditioner is not working?

Replacement of most air conditioning components requires complete evacuation of the air conditioning system with a refrigerant recovery machine. Once components are re-installed, the technician will remove all air from the system in preparation for recharging the system with new refrigerant.

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 GMC Envoy has air conditioning problems?

What happens if the clutch on the AC fails?

No cooling at all In more severe cases, where the switch has completely failed, your AC system will completely cease to blow cold air. Without the cycling switch to activate the compressor’s clutch, the AC system will not be pressurized correctly, and the system will be unable to produce any cold air as a result.

What to do if your Envoy A / C does not start?

Start the Envoy’s engine and turn the fan speed to the highest setting. Turn the A/C to the coldest setting. If the A/C compressor does not start, your compressor must be replaced. The compressor will cause the RPMs to temporarily drop when the compressor starts. It will almost sound like the engine is bogging down for a moment.

Where is the fuse on a GMC Envoy A / C?

Open the fuse panel under the steering column on your Envoy by pulling down on the fuse panel with your fingers. Pull the fuse for the A/C, using the fuse pullers in the fuse panel. Check the metal strip inside the fuse. If it is blown, replace the fuse with a new fuse of the same amperage.

No cooling at all In more severe cases, where the switch has completely failed, your AC system will completely cease to blow cold air. Without the cycling switch to activate the compressor’s clutch, the AC system will not be pressurized correctly, and the system will be unable to produce any cold air as a result.

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?

How is the compressor clutch relay turned on and off?

In some vehicles the compressor clutch relay is turned on and off by the low pressure switch and the evaporator temperature sensor. In a computer controlled system, the compressor clutch relay is grounded by the computer. If the fuse is good, disconnect the electrical connector from the compressor clutch coil.

When to replace the AC clutch cycling switch?

If your AC is not blowing air as cool as usual or is not working at all, you may need to replace your AC clutch cycling switch. The AC clutch cycling switch is a very important component to a modern vehicle’s AC system.

What causes an AC compressor to not engage?

If the clutch doesn’t engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, or a low pressure lockout. AC compressor clutches receive power in a number of ways. They can activate through a relay that’s energized directly by a proper condition of the low and high pressure switches.

Why do air conditioners need a low pressure switch?

Air conditioning compressors need a constant supply of oil to prevent catastrophic failure, and it’s the refrigerant that carries the oil through the system. That’s why car makers install a low pressure switch–to prevent the compressor from running if the system is low on refrigerant.

How can I tell if my compressor is running or not?

Not really. DIY kits come with a low pressure side gauge and they’re designed to provide a static pressure (engine not running or AC off) and a running pressure. Static low side pressure won’t give you any idea of system charge. You could have a low side target range of 50-psi and see that static pressure on your gauge.

What are common reasons my GMC Envoy has air conditioning problems?

What are common reasons my GMC Envoy has air conditioning problems? While there are a variety of reasons your GMC Envoy 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.

If the clutch doesn’t engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, or a low pressure lockout. AC compressor clutches receive power in a number of ways. They can activate through a relay that’s energized directly by a proper condition of the low and high pressure switches.

How can I tell if my AC compressor relay has failed?

Another symptom that the AC relay has potentially failed is that there will be no cold air at all from the AC. If the relay fails, the compressor will not operate and the AC system will be unable to produce any cold air at all. While there are several reasons as to why an AC may stop producing cold air, a failed relay can be one of the most common.

What are the signs that your AC is not working?

Common signs include inconsistent cooling, not hearing a click from the compressor turning on, and no cold air. 1. Inconsistent cooling 2. AC compressor is not turning on 3. No cold air Almost every single electrical system on a car is powered through some kind of switch or electrical relay, and the AC system and compressor are no exception.

What are the problems with a 2004 GMC Envoy?

Top 2004 GMC Envoy Problems 1 Air Compressor for Rear Air Springs May Fail 470 people have reported this 227 2 Fuel Level Sensor Failure 378 people have reported this 214 3 AC Blower Inop Due to Failed Resistor 272 people have reported this 121 4 CD Player In Radio May Fail 175 people have reported this 85

Replacement of most air conditioning components requires complete evacuation of the air conditioning system with a refrigerant recovery machine. Once components are re-installed, the technician will remove all air from the system in preparation for recharging the system with new refrigerant.

Start the Envoy’s engine and turn the fan speed to the highest setting. Turn the A/C to the coldest setting. If the A/C compressor does not start, your compressor must be replaced. The compressor will cause the RPMs to temporarily drop when the compressor starts. It will almost sound like the engine is bogging down for a moment.

Why is the air conditioner in my car not cooling?

The most common causes of broken air conditioning are leaks or compressor issues. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.

Open the fuse panel under the steering column on your Envoy by pulling down on the fuse panel with your fingers. Pull the fuse for the A/C, using the fuse pullers in the fuse panel. Check the metal strip inside the fuse. If it is blown, replace the fuse with a new fuse of the same amperage.

2004 Envoy.. When turned on A/C or defrost engine would stall & cut off. I turned off A/C or defrost, cranked & ran fine as long as both were off. Took to shop; had throttle cleaned.

My 2004 GMC Envoy vibrates when I turn the air conditioner or heater on . It stalls while I’m driving it and it scares me and makes me think that I’m going to break down . I just put a brand new battery in and it still stalls .

Why is the air conditioning in my car not working?

Having your car’s air conditioning go out suddenly can ruin your day fast. The most common causes of broken air conditioning are leaks or compressor issues. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.

What kind of climate controls does a GMC have?

You are currently viewing GMC.com (United States). Close this window to stay here or choose another country to see vehicles and services specific to your location. Your GMC is equipped with climate controls that allow you and your passengers to stay comfortable – whether you’re braving the heat of summer or the chill of winter.

Where is the speed control module on my 03 envoy?

All of the HVAC controls and temperatures function on the console of my 03 envoy, but the blower ignores the speed control. It usually is off, but sometimes comes on at arbitrary speed when the car is initially started. Where is the control module, Does it need reset? Please help. Thanks. I also have the same problem.

Is there a blower resister on a GMC Envoy?

Hi yes i have a 2004 GMC Envoy and that also happened to mine my air works fine up until you turn the dial to 5 its actually your Resister (which controls the fan speeds) a Blower Resister and you usually can only get it at the dealer.

What are the vents on a GMC Envoy?

One black straight rubber tube first, about 1 to 2 inches long, and a connecting plastic black elbow (90 degrees). He proceeded to clean them out by blowing in them and then reinstalled them. He said that this is where blockage impedes the flow of condensation and causes leaks in side.

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.