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Discussion Starter · #1 · (Edited)
I have got a problem with my electric fan, in my BMW 325ti (year 2001).
The fan does not turn on, when the engine is very hot. The instrument in the car, lights red.
The fan does not do the selftest on startup.
The fan starts randomly, for 10-15 sec. even when the engine is cold, and turned off.
I have replaced the temp sencor, but that did not help.
When i shotcircuit the temp sencor, the fan does not start.

How do i check if the fan control unit, mounted on the fan, is ok.

I am about to replace the whole fan unit, but it is quite expensive.

Have you got any suggestions?
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