Heater fan works only when switch is on high setting

FORD EXPLORER
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BILL HELGESON
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1993 Ford Explorer-Turned on heater fan switch and alot of nasty smoke came out of vents in cab, as though something was on fire. Fan now works only on high setting, not on any lower speeds. Hope you can help, THANKS!
Oct 10, 2006 at 11:20 AM
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BRUCE HUNT
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If the smoke is coming out of the exhaust, then you have an internal oil leak. This would be related to the rings. The smoke could be coming off the engine with a good leak from the valve cover. Is the valve cover leak pretty severe? How about the compression of the engine, etc. How many miles on the engine?
May 30, 2006 at 9:57 PM
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RAGS729
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Sounds like the blower motor resistor, it should be mounted somewhere near the blower motor in the heat/ a/c housing. it should have 2 screws holding it in, pull it out and if the coils are burned up thats your problem.
Oct 25, 2006 at 1:05 PM
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