My AR 2001 , aux cooling fan rum at high speed all the time , it sounds like a 747 lol..
Anybody ran into this before ??? It will stop as soon a press the eco button . and it will kick back when a turn the heat or ac no matter what temp, my control is at....
tahnks Paul

 

Sounds like the relay has gone bad.

 

Could you elaborate on the relay? Do you think blauparts would have a replacement? I have had the issue on my A6 for quite some time.

Like this?

http://cpwstore.carpartswholesale.co...3-1640908.html

 

I have not had to change the relay for my fan. The fuse on my fan blew, thus the fan never came on and the car overheated once in the summer. You are getting power to the fan, so the fuse should be good. You could always check and make sure the fuse is good.
Maybe someone could give more information.

 

The fan controller is supposed to respond to a failed fan by running the other fan at higher speed, so you want to check and see if both fans (the one in front of the radiator and the one behind the radiator) are running. If one is not running, troubleshoot the fan. If both are running, it's probably the controller.

 

Hi folks,
Did you get the aux fan running back as per normal operation? Was it the relay or the controller?

Thanks