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yogurt77 · 06-15-2009, 08:30 PM

This is for my friends 4cyl. When I hook up a store bought diagnostic computer the fan comes on,( computer says system pass with engine on and off) but once off the fan will NOT come on no matter how hot the motor gets. I changed a/c compressor from a used 4cyl. and there is no freon in system does it need freon for the a/c clutch to engage or does that have anything to do with fan not working? Also took thermostat out so car doesn`t overheat.

06-15-2009, 08:30 PM	#1
yogurt77 Join Date: Jun 2009 Vehicle: 1990 LX convertible 5.0 Location: pennsylvania Posts: 1	cooling fan won`t engage This is for my friends 4cyl. When I hook up a store bought diagnostic computer the fan comes on,( computer says system pass with engine on and off) but once off the fan will NOT come on no matter how hot the motor gets. I changed a/c compressor from a used 4cyl. and there is no freon in system does it need freon for the a/c clutch to engage or does that have anything to do with fan not working? Also took thermostat out so car doesn`t overheat. Last edited by yogurt77; 06-15-2009 at 08:35 PM.