Skip the auto shop - Our mechanics make house calls

Q: AC light on dash

asked by on

The AC light flashes on the dashboard, and the vent blows warm air instead of cold.

A: GM has a TSB out for this issue. If the sys...

GM has a TSB out for this issue. If the system is full, then the negative battery terminal needs to be disconnected to reset the climate control computer. If the system does not work after this, then gauges will need to be put on, and an AC performance check run, to guide the diagnosis. You may want to enlist the help of a mechanic, such as one from YourMechanic, who has the equipment, training, and certification to inspect and diagnose the issues with your AC system.

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・Save up to 30%

Get a quote

What others are asking

Q: Lock malfunction in 1991 Ford F-150 4.60.

Probably the modules are breaking down. There's a lack of control of modules in there. It has probably gone bad. If you hear clicking, it's not activating. They don't all burn out at the same time, so if none of...

Q: Coolant blowing out tailpipe

Hi there. A coolant leak on the these GM vehicles is common due to failures in core plugs. Core plugs are holes where block castings are filled from, and sealed to keep coolant in. I would have a certified mechanic...

Q: Fast Idle does not activate when A/C Compressor engages.

The idle is not supposed to increase in speed when your compressor engages, rather the throttle plate should adjust at the same time the A/C engages to maintain the same RPM at idle. This will keep the idle the same...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.