Strange wine sound when heat is on
 

Hello, I have a strange problem. When my A6 warms up and I start to pump the heat into the cabin, it will start to make a high pitched wine sound. It only makes the sound when I have the heat level at 1 bar up to 4 bars. But if I put the heat level above the 4th bar it stops the sound. Anyone have any idea whats going on here?

RE: Strange wine sound when heat is on
 

bump

I have the same problem but it gets loud when its really cold like 5 degrees.

RE: Strange wine sound when heat is on
 

is the high pitched whine coming from the engine or inside the dash?

RE: Strange wine sound when heat is on
 

i saw a write up on cleaning and oiling the blower motor.... you think thats what it is? the blower motor?

I will look it up and see if I can find it, ifi find itIll post the link

RE: Strange wine sound when heat is on
 

I had/have the same problem when I was home and driving the car. I noticed when the blower was on around 70F, but just circulating air because it was warm in the car, it would begin to whine like you are saying. If it dropped below the desired temperature the blower would start pumping warm air out and the whining would stop. Once it reached the desire temp again it would circulate and start whining again.

Maybe this is happening to you as it was me.

RE: Strange wine sound when heat is on
 

Like caddy2audi says, it's probably the blower motor end bearings, known to make more noises as the outside temp drops. The blower is behind the glove box, remove this to get access, several write-ups about oiling them to quiet them, for a while. Replacement of the blower is not overly expensive and easily DIY.

RE: Strange wine sound when heat is on
 

http://www.audiworld.com/tech/elec132.shtml


found it... may be worth trying to clean it before you replace it.... just dont assemble the glove box and run it for a couple of days and see what comes of it.... looks really easy to do.