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Heater fan works only when switch is on high setting

Tiny
BILL HELGESON
  • MEMBER
  • FORD EXPLORER
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!
Tuesday, October 10th, 2006 AT 11:20 AM

2 Replies

Tiny
BRUCE HUNT
  • MECHANIC
  • 3,753 POSTS
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?
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Tuesday, May 30th, 2006 AT 9:57 PM
Tiny
RAGS729
  • MEMBER
  • 29 POSTS
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.
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Wednesday, October 25th, 2006 AT 1:05 PM

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