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 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,496 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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