Audi 100 urS4 / urS6 after run fan

Audimaan · 05-08-17, 05:57 PM

Anyone had problems with the after run fan after switching the car off ??? Such as not working at all or starts running but never turns off resulting in draining the battery.....

shaun5 · 05-08-17, 07:01 PM

not sure on the S6 but on my S2 its controlled by a relay, maybe that is playing up?

Colin Aitchison · 06-08-17, 06:07 AM

Sorry in advance but never had a UrS6 but is the over run fan not controlled from the thermo/stat/switch in the bottom of the radiator, you will need to drain the coolant to change it but they are not expensive, one test would be, when the over run fan comes on after the engine is switch off, unplug the thermo/stat/switch, this is not a full proof test of the thremo/stat/switch because it may still be the relay, but the fan will be off and won't run down your battery, on the other hand if the fan stays on with the thermo/stat/switch unplugged you fault may be the relay stuck in the closed position, hope this helps.

Audimaan · 07-08-17, 09:28 AM

Quote:

Originally Posted by Colin Aitchison

Sorry in advance but never had a UrS6 but is the over run fan not controlled from the thermo/stat/switch in the bottom of the radiator, you will need to drain the coolant to change it but they are not expensive, one test would be, when the over run fan comes on after the engine is switch off, unplug the thermo/stat/switch, this is not a full proof test of the thremo/stat/switch because it may still be the relay, but the fan will be off and won't run down your battery, on the other hand if the fan stays on with the thermo/stat/switch unplugged you fault may be the relay stuck in the closed position, hope this helps.

Thanks its a good simple starting point, lets see......

05-08-17, 07:01 PM	#2
shaun5 Grown up member Classic Audi Club Member Join Date: Dec 2011 Location: taunton Posts: 790	not sure on the S6 but on my S2 its controlled by a relay, maybe that is playing up?

06-08-17, 06:07 AM	#3
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	Sorry in advance but never had a UrS6 but is the over run fan not controlled from the thermo/stat/switch in the bottom of the radiator, you will need to drain the coolant to change it but they are not expensive, one test would be, when the over run fan comes on after the engine is switch off, unplug the thermo/stat/switch, this is not a full proof test of the thremo/stat/switch because it may still be the relay, but the fan will be off and won't run down your battery, on the other hand if the fan stays on with the thermo/stat/switch unplugged you fault may be the relay stuck in the closed position, hope this helps.