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Cooling fan not coming on except with AC 900 1994

posted by  sredwine on  Sun Oct 9 08:49 CST 2011
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last visit: Tue Apr 24 18:44 CST 2012
[RELATED]

Hello Brickboarders,

My venerable 1994 940T has been boiling over lately. The temp gauge reads slightly over normal(1:00 on the gauge) and the cooling fan should be on. The fan and relays are good-it works fine with the air conditioner on and also responds to the OBD tests, both speeds.Car doesn't boil over with the fan on with AC, BTW. I've measured both sides of the ECT sensor (the rear sensor) at about 300 ohms with the engine partly warm.
Any ideas?

94 940T has 251K miles, 1996 960 has 181K, 2007 BMW 328 has 75K :)






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