Hi guys

My A4 B7 2.0tfsi quattro is running between 65 and 70 degrees. 
I think the fans are permanently running but I could be wrong. 
I have looked at changing the thermostat which looks like a big job. Is there a thermostat for the fans that could be a problem?
 

Any ideas please. 

Thanks

2 hours ago, WhisperingAl said:

Hi guys

My A4 B7 2.0tfsi quattro is running between 65 and 70 degrees. 
I think the fans are permanently running but I could be wrong. 
I have looked at changing the thermostat which looks like a big job. Is there a thermostat for the fans that could be a problem?
 

Any ideas please. 

Thanks

Hi there is only the coolant temperature sensor in the block not sure where , that would kick the fans in, if its both fans the control unit on the fan pack is probably faulty, easy test disconnect the fan control unit and take it for a drive and see if the temperature goes up to 90 degrees.

Steve.

Thanks Steve 

I will try after Christmas. Don’t want a broken car over Christmas. 

I now don’t think it’s the fans. So must be the thermostat. 
I will get someone to look at it after Christmas. 

Keep us posted on how you get on. What makes you think it's now the thermostat? 

 

I ran it a short distance this morning and the fans didn’t come on. 
So I was thinking the only other thing is the thermostat. Unless the fans are coming on but too soon. They certainly aren’t on all the time as I first thought. 
After Christmas I will try your suggestion of disconnecting the fans and see what happens. 
 

Thanks for your suggestions. 

The fans will usually come on and off if you have AC switched on to cool the condensor regardless of engine temp, from memory I think it’s a serpentine belt off and alternator moved out the way depending on exact engine layout to change the thermostat. If you haven’t already done so it’s a good opportunity to change the alternator pulley as they are known for failing with age 

Hi

Thanks gor replying. 
I do usually drive with my aircon running. 
I have a favourite mechanic I use. I will take it to him in the new year and see what he thinks. 
I no longer suspect the fans as much as the thermostat. 
 

Please keep us posted Alan.

I will as soon as I have any news

Update.
the car runs normally just below 70 degrees   If I get stuck in traffic for a while. Heavy traffic not moving, then the car goes up to 90 but not above. Took the car for MOT and look at the temperature. £360 for the thermostat. Decided to leave it for a while as it isn’t a big problem.