HEATER FAN NOT WORKING

  • Tiny
  • drduff
  • 1999 GMC Safari
  • 163,000 miles

1999 GMC Safari heater fan not working, wired directly to battery and fan runs (med. Low speed) my guess is the resistor prior to stopping seemed to be very low speed on all speeds except high I know location of resistor (under windshield washer) upon starting of vehicle defroster fan not working at all wired directly to battery and fan runs.

Great site : -)

Friday, February 10th, 2012 AT 1:59 AM

4 Answers

  • Tiny
  • fixitmr
  • Member

Have you checked fuses and wiring to fan?

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Friday, February 10th, 2012 AT 2:34 AM
  • Tiny
  • drduff
  • Member

All fuses & wires are good

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Friday, February 10th, 2012 AT 3:08 AM
  • Tiny
  • fixitmr
  • Member

Does that have auto or manual temp control?

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Friday, February 10th, 2012 AT 4:36 AM
  • Tiny
  • fixitmr
  • Member

Check hot wire to motor for juice. If no juice check fan relay. Also does relay engage when fan selects high. If juice present check ground wire to fan.

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Friday, February 10th, 2012 AT 5:13 AM

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