Question about 1992 Chevrolet C1500

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Loss of power to heater control unit 92 k1500

My heater unit also died suddenly. I found a loose connection on back of fuse panel. after replacing the fuse, the unit worked, until I connected the fan. Now i have no power, a good fuse, and no visible problems. Even after unhooking the fan, I get nothing. I had the fan hotwired, so the motor is good. I replaced one serv and checked the other. they are both good. the problem only resurfaced after connecting the fan. I'm starting to wonder if it might be the relay for the fan?

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  • Master
  • 534 Answers

Replace the fan relay, it is most likley the problem.

Posted on Jul 10, 2009

  • John Bloomfield Jul 10, 2009

    Replace the fan relay, it is most likley the problem.



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0900c15280061a21.jpgFig. 1: Removing the heater duct assembly
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