A6@17

Don't know much about it, so, i'm gonna need some advice. Whenever it's warm outside and i have the air conditioning on, the fan is really loud, or it might be the belt, does it even have a belt?? hmmm, your guess is as good as mine...Thanks!

AudiOwner.com

Is it blowing cold air? If so, HOW do you know it's the AC?

muzzy996

If you are, you could have a faulty fan controller OR you just have the AC set to a low temperature compared to outside the car that causes the controller to run the aux fan at max RPM.

From what I've read based on searches in the forums it's normal for the aux AC fan to go into high gear so to speak when the system needs to be running at maximum. For example, turning on the AC on a hot day after the car has been parked in the sun can cause the aux fan to kick into high gear for a few minutes while the passenger cabin is cooling down. Once things cool down inside though, the controller should drop the RPMs down (at least this is my impression, I haven't owned the car long enough to be a pro at this yet).

Cargasm2.7

It's an Audi, that's what it does.

fkess

The auxiliary/ac fan in most cars sounds like a threshing machine. You should hear the one in my '91 100.

carbonLORD

...ended up being the AC was either not charged enough or too charged up IIRC.

It only goes into "Turbine mode" when its over 90° outside.