HVAC controls

Discussion in 'GM Electrical Tech' started by pipeguy, Jan 4, 2010.

  1. pipeguy

    pipeguy New Member

    Hi guys, my heater controls stoped working, the fan part only works on 5, when i put it on 4,3,2,1the fan shuts off, do i have to replace the controls? thanks in advance.
  2. TritonBoulder47

    TritonBoulder47 Rockstar 4 Years 500 Posts

    It's usually not the control head, but the resistor on the blower motor... It's a semi-common thing with GM's...
  3. vncj96

    vncj96 Epic Member 5+ Years 1000 Posts

    ^^^^ X2, its the resistor, cheap fix.
  4. rodny26

    rodny26 New Member

    This is amazing. My '96 k1500 started doing the same thing last month. I was about to go and have the control head replaced but thought it weird that it would only work on 5. You guys rule!! I'm gonna pick one up from CLASSIC PARTS. Thanks again.
  5. identityPRS

    identityPRS Rockstar 100 Posts

    i have had the same problem, and just fixed it. heres my post: http://www.gmtruckclub.com/forum/showthread.php?t=35065
  6. SCAIR001

    SCAIR001 New Member

    what year truck is ? Some of the later model gm's have an electronic resistor thatt goes bad and most of the time takes the connector with it.

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