Question about 1997 BMW 328

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Heater fan motor

The fan makes a noise at low speed and high speed,and some times turns it's self on and off.the noise sounds like the fan is catching some thing.hope you can work this one out for me,many thanks tony.

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The fan motor can be checked by using jumper wires. remove the wiring connector from the fan.Run the positive wire from the battery to the positive on the fan and the ground to ground. It should turn smoothly and at normal speed at 12 volts.If it is slow and noisy, the bearings making the noise. This indicates the motor is bad.

Posted on Nov 20, 2008

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