Q: Q: AC not working properly.

asked by on

My Saturn Vue's AC will not blow cold air at idle when it's running in park, stopped at a traffic light or a stop sign. It'll only blow cold when I'm driving or if I rev on the engine while it's in park. I checked psi at low pressure line while engine running in idle with AC turned on max and it reads between 80-85 psi. When the engine is revved the pressure gauge will drop to 45 psi. Fans and compressor seem to be operating normally. Any answers on what the problem could be would be greatly appreciated. Thank You!

My car has 117000 miles.
My car has an automatic transmission.

Your low-pressure reading of 80-85 psi is a bit high. Even with ambient temperatures of 100 degrees, a reading of 50-60psi is normal. A few things can be causing that high reading. First, if the system has been charged recently, it may have been over-charged. Second, a restriction within the A/C system like a partially clogged expansion valve or receiver/dryer. Finally, the car may have a failing A/C compressor. If you need help having these checked, have a mobile technician from YourMechanic inspect your A/C system for a proper diagnosis.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: AC not working properly.

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: Where can i find my cabin air filter on my 2006 Buick Rainier?

If the vehicle is equipped with one, you can find it by lowering the glove box and looking behind it for the filter cover. Remove the cover and filter will be inside. If you find that the cover is not...

Q: Sunroof not closing in 2005 Saturn Vue

Hello! Behind the headliner and sunroof switch is the sunroof motor. Near the gears of the sunroof motor, there is a little slot where you can stick a screwdriver into a hole and manually close the sunroof. If you need...

Q: Aircond fan sometimes does not turn on when ac is on but turns on when radiator fan is on

The a/c compressors are known to intermittently not engage on these vehicles and once the systems pressures are verified and no other component is tested bad then the compressor clutch should be checked to see if it is getting power...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...