gonzilla

As summer is here in SoCal, I've been using my AC a lot more. I've noticed that when the clutch on the AC compressor engages, it emits a whirring sound. It's almost like it's got a bad bearing. I can hear it inside the car over the engine. This is the first summer that I've had the car, so I haven't driven it with the AC before. I've never heard the compressor in any other car I've owned, so I'm wondering if something is amiss.

p_carfan

Dude, mine's almost completely silent.......and that's with the rear lid up

Martin S.

I can hear mine when it cycles on. Also living in a hot part of the country, I am just happy it works. :

However, if you are really concerned, you can always check with CA PERFORMANCE AIRE Scott is a Porsche air conditioning genius. He also runs a very well respected Porsche repair shop.

For factory repair in LA/OC, I would go to Newport Auto, the Porsche dealer in Newport Beach, CA. Be certain to ask for Kevin Kelly, a master diagnostician and overall incredible "wrench". He was the lead guy at ANDIAL a few years back.

Mark Kinninger at Black Forest in San Diego is also very good with air conditioning diagnosis and repair.

bigbye:

Bruce SEA 993

I hear mine a lot as I have th eRS motor mounts...they transmit a lot more of the sound of the compressor intot the cabin.

Having said that, I do not drive that much in traffic or around town in stop and go stoplight stuff. If I did, i would not like the effect of the motor mounts.

The good side of th emotor mounts far outweight the downside so I love them. Perhaps your car has the mounts and you didn't know...are you the original owner?

I also cannot remember how much noise there was before the RS motor mounts but it is real definite now. It disapears with RPM and speed so I just go fast as I can!

c993k

Mine is silent also.
Chris

MikeAlwaysWins

I've never heard mine at all..

gonzilla

I've got RS mounts, but it's not a vibration sound, it's a sound from the compressor itself when the clutch engages. Sounds like I have a loud compressor from what the rest of you are saying! Guess I'll just live with it and wait till it goes.

Monty

Mine is silent too. Have it recharged with the synthetic oil pack before using again.

tjhcom

Mine is very loud -- I hear the same whirring sound when the AC clutch engages. My independent service shop looked at it and said everything was fine. It hasn't gotten any worse. Let us know if you determine that something is wrong. Thanks!

95 C4 993

Never even hear mine.

texas911

On mine I can only hear the fan from the front of the car. Is that what you're hearing?

gonzilla

No. Try this... With the car on, turn on your A/C. Open the hood and let it sit. Go back there and watch for the clutch to engage on your A/C compressor. When it engages, is it loud? Mine is. I'll have to ask at Callas Rennsport next time I take it in for something. The A/C seems to work fine, just a little noisy.

LT1

I can hear mine cycle on and off when I'm driving around town. Seems to work fine

ZombiePorsche44

Never heard a peep from mine.......get it checked before you possibly do any more damage to the compressor or it's clutch.

ZP44

jmayzurk

I have always been able to hear the compressor cycle on and off at idle (1997 993tt). Driving, I can't hear it.

Today I installed RS motor mounts. The sound is exactly the same as before.

With the decklid open, my compressor is not particularly noisy. I think the sound is normal; some people are probably more sensitive to it than others.

-Jeff