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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 07-29-2008, 07:17 PM   #1 (permalink)
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Radiator fan not working 328ci manual???

I have a 2000 328Ci manual and the radiator fan does not cut on. It doesn't cut on with the A/C on or when the car gets hot (car will evently run hot). How do I test the fan to see if it works or if it's just the temperature sensor or a swtich? And if I have to replace the whole fan how difficult is it to replace myself?
Thanks for any info and help!!
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Old 07-29-2008, 08:06 PM   #2 (permalink)
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follow the wire that comes out of the fan motor and disconnect at the connector. apply a 12Volt voltage and see if it turns with a "whoooooosh". YES, then fan motor is ok... NO, or turns sluggish; it's time to replace.

There are no relays or switches; fan is controlled by the IHKA module.

Guesstimate time to replace a fan motor for DIY.. 2-3hrs
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Old 07-30-2008, 07:54 AM   #3 (permalink)
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Thanks for the info...I'll try that this weekend.
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Old 07-30-2008, 08:51 PM   #4 (permalink)
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What is a good way to apply 12 volts to the fan? Should I just use a car battery?
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Old 08-01-2008, 09:23 PM   #5 (permalink)
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12Volts from battery is the most logical way
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