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Front fan

 
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in2bmw



Joined: 23 Feb 2008
Posts: 6
PostPosted: Sun Sep 05, 2010 9:24 pm    Post subject: Front fan Reply with quote
My front fan is not working....Checked fuse #3 and its good...is there a relay I can check.....
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m78



Joined: 14 Nov 2001
Posts: 2807
Location: In the great midwest
PostPosted: Sun Sep 05, 2010 10:17 pm    Post subject: Reply with quote
There's 2 diiferent fuses for the aux fan. one 15 amp and one 30 amp. Check both first.

There is also a resistor for the auxiliary fan. 2 different types depending on which model and year you have. Here's plenty of info on it...

http://www.unofficialbmw.com/phpBB/viewtopic.php?t=32791&highlight=aux+fan

Unfortunately it could be the fan motor itself is dead.
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Ken Juul



Joined: 16 Jan 2002
Posts: 913
Location: Williamsburg, VA USA
PostPosted: Wed Sep 08, 2010 11:23 am    Post subject: Switch Reply with quote
My experience has been a faulty temp sensing switch or dirty connections on the switch. It is the temp switch that is screwed into the radiator. 3 wires, one is power the other two are high and low speeds. You can test the motor/resistor by jumping the wires. Also check the ground lead from the fan. If it turns out to be the switch, its high on the radiator, easy to change without loosing alot of coolant.
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