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1999 BMW 328i Question: Radiator cooling fan not coming on

 

Question

ediot59, Fort Worth, TX, May 06, 2010, 00:54
 Rookie

Has 12volts to fan module, also motor does run when voltage applied. How do i troubleshoot controls properly.

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    dandd May 06, 2010, 18:12
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     Master

    Best way is to use a scan tool to look at the coolant temp and then to see if the engine computer is turning on the fan when it should. Does the fan come on when you turn the A/C to a really cold temp? (This will test some of the system) It absolutely should!.

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    ediot59, May 23, 2010, 02:10
     Rookie

    Used a scan tool. Found coolant temp sensor faulty. Replaced sensor, the fan operates as it should now. Thanks!

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  • Answer #2

    Visitor, July 27, 2010, 07:56

    check the fuse box for bad ones

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  • Answer #3

    mensa man September 27, 2010, 09:00
     Technician

    replace fan sensor in the radiator

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