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a.c. help 3 700

posted by  jimnau on  Mon Apr 26 07:18 CST 2004
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last visit: Sun Jul 6 09:52 CST 2014
[RELATED]

The auxiliary cooling fan in front of the radiator does not automatically come on when I turn on the AC in my car ('91 740). The fan is activated by the thermoswitch in the top of my radiator.

If you let the engine idle on a hot day, the fan should cycle on and off, whether you have the AC on or off--if it does not, my guess is that your thermoswitch has worn out. Could also be the relay, but I would check the thermoswitch first.

Jim Nau
'91 740 129K






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