Contour Enthusiasts Group Archives Forums General Troubleshooting High Pitch Whining w/ AC

I dont know if its a problem or not. But lately every time I turn the AC on it makes this high pitch whining noise. The noise gets louder when I accelerate. Anyone know what this is? Is it a problem?

Anyone?

You might have the "moose". Do a search on it in the problems forum.

Uh, doesn't sound like the moose. The moose makes an appearance at startup idle. The moose doesn't have anything to do with the A/C. Trust me, he showed up in the middle of the winter for me.

But your A/C? I would get it checked out as soon as possible. If it is whining there is probably something wrong with it, but I don't know what.

I get this on occasion too. Under load (acceleration, slight uphill etc), I hear a high pitched whine. It isn't too loud though. I honestly don't pay too much attention to it. I've had it on & off for the last ~15 k or so.

52xxxK now.

Rad fans are a possibility, although I don't see how acceleration would affect noise. Speed might, due to air flow on blades from car movement. Cause could be either bearing or air flow whistle.

Pulling fan hi-speed relay (r2 - black, engine fuse box) for a short test would confirm/eliminate this source. Perform test from cold start, a/c off, relay out. Start, run, a/c on, listen, a/c off, end test, ignition off, restore relay.

If your car is still under warranty you might want to get it checked at dealer in case it's compressor related.

Thanks guys. Looks like its time for a trip to the dealer.

I've had something that sounds a lot like this for ages and ages...not quite the moose, but similar. Usually happens when I start the car and turn the a/c on right away, and also sometimes when I start the car when it's still hot.

I've always assumed it was the auxilliary fan kicking in. Maybe I should get mine checked!