Hi There,

I have a problem with my 2003 A4 1.8T. I have my engine light ON, and when I start the car with cold engine (in the morning), I got radiator fan run on full speed.
I was idle the car, and after 6 minutes, the fan is OFF.
but when I park the car and leave about an hour, when I do start the engine again, the radiator fan is running again in full speed.

I have changed coolant temperature sensor, but the fan still run when I start on cold engine.

Any suggestions would be appreciated.

 

Might be the Fan control relay. Easily accessible, under the hood above the fans. You need to take out the 2 screws ( i think 2) and pull it off and write down the number.

 

thanks for the advice.
do you know where's the fan control relay located? do you have picture of this??
thanks

 

Let me google that for you
Not that hard, 6th link down.