Q: Air conditioning is pretty much useless

asked by on

The AC in my 2012 GMC Acadia works intermittently and the AC light will light up on the dashboard right before it fizzles out. I am pretty sick of having this reoccurring problem at 59,000 miles. Is there a part that would fail and make it turn on the AC light then stop working right after?

The A/C indicator light blinking is an indication that the system is low on refrigerant or a defective pressure sensor or wiring issue. The way you described your problem is that it is an intermittent one. The fact that your system works fine at times tells me that most likely your system is not low on refrigerant but instead a sensor or your wiring is the issue. The system has a pressure sensor mounted to the A/C compressor which senses the pressure in the system and if defective could cause the erratic signal causing low pressure indication when the system is not low on refrigerant. I recommend you contact YourMechanic to have a thorough A/C diagnostic test and computer scan for A/C codes. The technician will confirm A/C pressures are normal and electrical wiring is not damaged to the A/C pressure switch. They will then scan the computer and check for A/C codes and diagnose as needed to give you a repair solution to fix your problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Air conditioning is pretty much useless

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: Sometimes when driving a wrench light comes on and my car is hard to shift

This may be related to low transmission fluid, or potentially a faulty transmission speed sensor or transmission control solenoid. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission fluid into the valve...

Q: Cooling fan will not turn off

The cooling fans are controlled On and Off by the engine ECM. The ECM commands the cooling fan relay module box (on left front of engine compartment) to turn on the fans when needed. If the fans are on all...

Q: I hear a weird rattling sound when I let off the accelerator.

I hate to say it but it sounds like the issue is the transmission. There are a few things you could check before you go back to the rebuild shop. Check the driveshaft and U-joints. And check the engine and...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.