Thread: Weird sounds when A/C is on

My car does the same thing but only on days where it's above 90*. It comes and goes and has been doing so for over 3 years. Never gave me any problem.

lol if u want a compressor i have a used one i will sell ya

Originally Posted by Nathan07GP

Mine does the exact same thing. Been doing it for a while and the ac is still running. Kind of like a wining grinding noise.

Does it only occur when the A/C is on? The compressor may be a possibility.

If it is more of a high pitch whine, it may be related to the temperature actuator shaft. These are just suggestions, not a diagnosis.

Consider having the vehicle inspected by a certified technician for an official diagnosis. Please keep us posted.

Louis
GM Customer Service

I know this is an old thread but figured I would bump this up. I have been having the same kind of issue with my AC lately. When I turn on the AC and the car is just under 1K rpms and the car is in drive, it makes an aweful noise. Almost sounds like something is lose and vibrating. As soon as I turn the AC off by pressing the button on the HVAC the sound goes away. Not really sure what it is. Not sure if it is just out of refridgerant or oil. The air is still cold that is blowing inside when it is on. The car just started doing this. I am going to try one of those recharger kits to see if it does anything.

Any thoughts from others?

Thanks
-Mike

I took a better look today after work. The sound is coming from the tensioner.

Yup that's exactly what I thought. I will replace it with a new dorman unit.