Quote:
Originally Posted by Beamernewbie
Are you referring to the fan on the radiator? Does it turn on when the ACturns on? I'm not sure at this time.
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A scan with INPA or other BMW-specific OBD tool is best to diagnose a faulty Aux. fan but a simple test you can do is watch the fan through the grill (or with the hood up) while someturns turns on the ignition. You should see the Aux. fan spin up a little, as the DME does it's Aux. fan start-up diag. tests.
It doesn't spin much (mine kinda just twitches and jerks, then spins up slowly then stops) but if it does something, it's probably OK.
Another test is to start the car (stationary), turn on the A/C and blower to Max - the fan should really spin up!
