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Heater only works on high

Tiny
SCHAEFERBOY
  • MEMBER
  • 2002 FORD TAURUS
  • 3.0L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 76,200 MILES
Heater only worked on high. I put a new resistor in as suggested and the heater worked fine for about a week and then it went back to working on high only again. Any help would be greatly appreciated. Thanks, Tom B.
Wednesday, December 28th, 2016 AT 6:34 AM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
That would mean that the blower motor is drawing too much current and burning out the resisters. You need to change both the blower motor and the resister at the same time.
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Wednesday, December 28th, 2016 AT 6:43 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Also, make sure none of the plugs have been overheated causing a bad connection which will increase resistance.
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Wednesday, December 28th, 2016 AT 6:44 AM

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