B6 A4 1.9 TDI Right, I have 2 fans at the front of the car. As I got home tonight, I tuned the air con off about 30sec before turning the engine off. Shortly after, I heard a fan in the engine bay winding down. Though it was unusual. Opened the door and turned on the ignition (not engine) and the fan came on for about 10 sec (the fan on the driver's side), then went off for 10 sec, then came on for 30 sec, then off for 5, back on for... I turned the ignition off after that. I assume it would just carry on like that. I've had a bit of a search and come up with the control module for the fan, but I'm not sure my symptoms fit the bill. I have a capacity prob with my air con if that is relevant - can't put speed higher than 4 or it just blows ambient air. Any ideas guys? EDIT: Just left the car for an hour and tried the ignition again & now the fan on the right is on permanently.