nstergi

Hi guys,
I have this problem:
I start from cold and after a while both radiator fans start and stay perminately.The oil temperature gauge dont even get to 70 degrees celcius when the fans start.

Any idea with this problem
please help

AudiHaldex

There is a control unit mounted at the front of the engine bay that controls the engien colling fans and air-con these are **** to having problems. Althogh I have seen an A3 with a similer problem which turned out to be the thermostate stuck open, you can test for this by starting the car from cold and monitering the temprature of the colloant pipes with your hands to check how the coolant is flowing.

nstergi

thanks for the reply audihaldex,
which thermostat are you talking about?
the engine coolant sensor or the Coolant Temperature Sensor? i dont have any idea where they are located

nstergi

ok had all of them changed. ecu a presostat and thermostat.
the problem still exists.should i think of the cpu of the car?

AudiHaldex

More ofen than not it will be the control unit if this hasn't solved the problem then I suggest that you have the Audi center test the loom on the car. I have seen one A3 before that had a similer problem that turned out to be broken conection on the secondary water pump this took a long time to find and may not be the only place that this problem could be caused from.
Best of luck