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

Question type: Maintenance & Repair

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

3 Answers

12,005

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.

3 out of 3 people think this is helpful.
2,695

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

2 out of 2 people think this is 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 out of 3 people think this is helpful.

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