dezithug is right.. i have a a4 and it does the same thing... nor have i had the time to tear it apart looking for the noise it is annoying. i just turn up the fan or the radio... lol

 

yeah, that sound is coming from the blower... My does the same thing when its cold, but it only does it on 4-5 bars fan speed ... I have an 2002 A6.

 

follow up - the dealership determined the blower was off balance - and repalced it - no more problems! yipperr

 

Choraltech is right on the money. I just bought an A6 that my daughter has named The Cricket because of the AC/Heater blower motor. I plan to replace the assembly because it is unpredictable and can make the noise at any fan speed or even start and stop when going over bumps in the road.

 

I had this noise on an earlier car and also thought it was from the heater blower area it turned out to be the springs in the driver seat

 

I have the same problem with my 99 A6, but it seems to be most noticeable on right turns for whatever reason. Would a problem with the heater blower affect a chirping only to the right? I don't see the correlation, but I guess it could be an imbalance and so when I make a right turn or hit a speed bump it could slightly set it off. Also, if it is the heater blower, is it easy to replace on my own?

 

5 bolts to drop the glove box panel (2 down low and 3 at the top when you open the glove box). Then it's another 3 bolts and a connector to get the blower out.

It chirps when you turn due to the gyroscopic effect - the blower axis resists changing direction. Give it a chance, it will start to chirp more and more!

 

Does anyone know where I can get this replacement heater blower?

 

eBay or breakers yard

 

Breakers yard?