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Join Date: Jul 2005
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Auxiliary Air Fan

1989 325I convert. New to me. A/C not working. Charged system and all OK except Auxiliary Fan doesn't come on when A/C on. I expect it to come on immediatly. Runs when jumpered at radiator temp switch and also when jumpered at relays. Don't have wiring for system. What causes and how does fan get turned on when A/C turned on. Also should it also come on when "Recirculation" switch on?

Old 07-28-2005, 08:07 AM
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The fan only comes on at certain eng temps & certain a/c pressures
It doesnt just stay on
Old 07-31-2005, 11:59 AM
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Sorry, I re-read the authors post, and I stand corrected, hence the edit.

Last edited by makaio; 08-01-2005 at 06:48 AM..
Old 07-31-2005, 12:57 PM
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Sounds like the fan & resistor are good if you can jump it.....does the fan ever come on????

Old 07-31-2005, 01:00 PM
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