Why does the radiator fan run even when the cars not started

Asked by Jun 09, 2012 at 08:48 PM about the 2002 BMW 3 Series 325i Sedan RWD

Question type: Maintenance & Repair

Air doesn't blow cool, radiator fan comes on when the cars not running.

3 Answers

14,125

If it's coming on even when the engine is cool you most likely have a relay issue to the fan or a control issue to the relay.

5 people found this helpful.
3,145

Check your temp sensor to see if it's working correctly

2 people found this helpful.

The fan on that vehicle is digitaly controlled by the vehicles DME if the fan is running all the time even with the vehicle off then te fan module (fan assembly itself) is faulty

3 people found this helpful.

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