E39 Aux Fan Problem - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
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#1 (permalink) Old 10-03-2011, 07:20 PM
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E39 Aux Fan Problem

Does anyone know if you remove the Aux Fan that the check engine light comes on? I had mine go bad- bearings. tried to install an aftermarket one and found it was a single speed instead of the 3-wire multi speed that comes with the car. Anyway, I had to leave it off to drive the car and now the check engine light is on and the AC compressor won't come on( I was trying it for just a minute etc. it was cool out so I was not worried about a high head pressure issue for a minute or two). I have a new assembly coming this week, but was concerned with the check engine light coming on. Car runs fine. I am assuming the car is reading the circuit thru the aux fan and does not see the continuity of the motor. Anyone have any knowledge.

Thanks,

Ken
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