Skip the auto shop - Our mechanics make house calls

Q: Air conditioning not working - 2010 Chevrolet Tahoe

asked by on

During a trip to Houston from New Orleans my AC kept freezing up every 30 minutes. I check to see if it was low refrigerant but everything looked normal. After a few weeks of it running normal and occasionally freezing, I notice it stop getting cold all together. When I got home I left it running and I noticed that the condenser wasn't working. I checked all the fuses but nothing was burnt out. I did a little bit of research for that model truck and some people were saying they were having problems with the temperature control switch. Is there anything I can do at home to troubleshoot and figure out the real issue myself? Thanks in advance.

My car has an automatic transmission.

A: Hey there. It is possible that you can dete...

Hey there. It is possible that you can determine if the refrigerant level is low, and the low pressure switch is protecting you by not engaging the compressor, or if the control switch is not called for compressor engagement.

With the engine running, and the AC control set to "AC On", jumper the low pressure switch in the small refrigerant line briefly. If the compressor is engaged, and you get cool air at all, the system is just low on refrigerant.

If the compressor is NOT engaged, check for voltage to the low-pressure switch with the same test setup. If there is not 12v signal to that switch, the control switch is not signaling for the compressor and may have failed.

For additional assistance with this, I would recommend having an AC is not working inspection completed by a mobile, professional mechanic, such as one from YourMechanic. They will be able to diagnose this problem, get an accurate assessment of damage, and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Transmission does not shift properly

This may be a result of low transmission fluid or potentially a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors such...

Q: Check Engine Light - Code indicates O2 sensor 1 error

The O2 sensor is a sensor in the exhaust system that reports to your car's computer how much unburnt fuel is in the exhaust gases, which then tells the fuel injection system how to adjust the fuel mixture. When the...

Q: Overheating condition of my engine.

Either there is still air in the system causing steam which will make the sending unit spike to the high levels or the coolant temperature sensor - sending unit is not working. If a coolant temperature sensor - sending unit...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.