Why is my Chevrolet TrailBlazer AC not working?

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 Chevrolet Trailblazer has air conditioning problems?

What was the owner’s manual for the 2002 Chevrolet TrailBlazer?

Why is the clutch not working on my Trailblazer?

Being that it is intermittent, I would suspect the HVAC control module not supplying power to the clutch coil of the compressor while the relay is activated. That is the way it looks to me, maybe someone else may read it differently. Sounds like you did almost everything except the most obvious and common cause of this. Check the clutch gap.

Who is the owner of the Chevrolet TrailBlazer?

GENERAL MOTORS, GM, the GM Emblem, CHEVROLET, the CHEVROLET Emblem and the name TRAILBLAZER are registered trademarks of General Motors Corporation. This manual includes the latest information at the time it was printed. We reserve the right to make changes after that time without further notice.

What kind of car is the TrailBlazer LT?

The Chevrolet Trailblazer LT is a light-duty SUV that took the place of the older Blazer. Several technical service bulletins are published from the manufacturer concerning air-conditioning (AC) problems in the vehicle.

Why does my Chevy Trailblazer make a whining noise?

Might try disconnectiog the negative cable from the battery for 35 min (as per GM) to reset the computer. I also have an 02TB. When its running it makes a loud whining noise. Several people have told me that its the power steering pump. There is no leaking, and no resistance in the steering wheel. When I turn the A/C on the noise almost disappears.

Who are the owners of the Trailblazer front vent?

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What kind of clutch does a trailblazer have?

TrailBlazer AC Clutch not engaging. 2004 TrailBlazer LT, 124K miles, 4.2L, Automatic Dual Zone Climate Control, all stock. This truck has been very good to me, without many problems at all.

Why is my GM AC clutch not working?

Been a problem with GM AC compressors ever since some nitwit elected to use an interference fit for that clutch plate. It either closes the gap so the compressor is running all the time or just getting red hot from friction or more common widens so the magnetic field that decreases by the square of the distance can’t pull it in.

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 Chevrolet Trailblazer has air conditioning problems?

What kind of engine does a 2002 Chevy Trailblazer have?

2002 Chevrolet Trailblazer EXT 4.2L Engine. It died on me the other day I got a boosts. Later that day I got a new battery. They check the alternator and its fine. We notice the back AC was on and the truck turns off even when we turn on the ac

What causes a Chevy Trailblazer to stall at idle?

We notice the back AC was on and the truck turns off even when we turn on the ac or heat on the front it shuts. Off what could be the problem. Answer: Stalling with the A/C on at idle is usually caused by carbon build up in the throttle body. The throttle body bore and plate should be cleaned with a carbon cleaner spray.

TrailBlazer AC Clutch not engaging. 2004 TrailBlazer LT, 124K miles, 4.2L, Automatic Dual Zone Climate Control, all stock. This truck has been very good to me, without many problems at all.

Why is my air conditioning not working on my Trailblazer?

While there are a variety of reasons your Chevrolet Trailblazer 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 will be the outcome of an air conditioning system diagnosis?

What kind of a / C system does a trailblazer have?

The A/C system in your Trailblazer consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling. How to add freon to your 2006 Chevrolet Trailblazer: hook up the can of refrigerant (likely r-134a) to the low pressure port.

Why is the clutch not kicking on on my Chevy Trailblazer?

Bypassed the low pressure switch with no change. With AC turned on, the clutch on the compressor does not kick on. The fuses all looked good for everything ac related. What should be my next diagnostic steps, jump relay, check power at the compressor plug?

How do you add Freon to a Chevrolet TrailBlazer?

How to add freon to your 2006 Chevrolet Trailblazer: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.

Are there any problems with the Chevy Trailblazer Lt?

What can I do about my Chevy Trailblazer AC compressor problem?

I used CRC “Clean-R-Carb”. Cuts the deposits very well. You can get to some of it from outside by taking the intake and resonator box off, propping the throttle plate open ( key OFF!) and carefully cleaning around the surfaces where the throttle plate sits at idle.

What’s the average mileage of a Chevy Trailblazer?

With 544 people reporting this problem, you can see why it’s a big deal. The average miles it occurred at was 91,740, although it could happen as low as 5,700 miles. In 2002-2008 Chevy Trailblazers around 114,075 miles, consumers reported that the HVAC blower motor would stop working at one or more speeds.

Where are the fuse panels on a Chevy Trailblazer?

Here you will find fuse box diagrams of Chevrolet TrailBlazer 2002, 2003, 2004, 2005, 2006, 2007, 2008 and 2009, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Where does the AC relay to the compressor come from?

The ac relay to the compressor only supplies the 12 volt power to the compressor through the clutch coil, when it is pulled in by the HVAC control module. It show that it is a light green wire coming from the HVAC control module, section “B-12” on my schematic.

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.

What to do if your Duramax compressor is not working?

Use an ohm meter on the low pressure switch and make sure the resistance is very low (ie not open). If the switch is working, then when plugged in it should connect the circuit and allow the compressor to kick in. If not, it needs to be replaced (and of course the system needs to be recharged again).

Why does my trailblazer not go over 3000 rpm?

My Trailblazer has no power and will not go over 3000 rpm. I have replaced the spark plug, gas filter, throttle body acceleration pedal sensor and the crank shaft sensor. I am at a loss of where I go from here.

Why is the spark chain on my trailblazer not working?

The timing chain (or belt) is responsible for keeping the upper valve train synced with the crankshaft. This is vital for spark timing. If the timing is off a little and the engine still runs, the timing belt may have skipped. If it has jumped too much the Trailblazer may not even fire.

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.

What to do if your AC clutch is not working?

With AC problems, yes you have AC problems, first thing I do is connect my gauges and power supply directly to the clutch coil. If like the high side skyrockets, can instantly switch it off. But that tells me if the system is mechanically okay and performing properly.