WHY WOULD MY HEAT AND DEFROST ONLY WORK ON SPEED...

  • Tiny
  • Anonymous
  • 2003 Ford Expedition
  • 170,000 miles

Why would my heat and defrost only work on speed 4(the highest)?

Friday, January 18th, 2013 AT 6:52 PM

1 Answer

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Chances are the blower motor resister needs replaced. It is common to only have the high speed work when they fail.

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Friday, January 18th, 2013 AT 6:53 PM

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