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its getting cold, and i need a little help

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by milspecjimmy, Oct 17, 2002.

  1. milspecjimmy

    milspecjimmy 1/2 ton status

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    my heater will work fine on low, med, and high, but when i put it on max, it goes back to low speed! any ideas? i replaced the switch and it stil does this.

    thanks
    ~~~jeff
    /forums/images/graemlins/k5.gif
     
  2. imiceman44

    imiceman44 1 ton status

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    If you changed the switch and still does the same then your wire that feeds the direct connection on the blower could be bad.
    The thing is the switch goes through a series of resistors on one line and then in the max position switches to another line that gives full voltage to the blower.
     
  3. milspecjimmy

    milspecjimmy 1/2 ton status

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    what color is this wire? and where does it go?
    /forums/images/graemlins/k5.gif
     
  4. eshorvath

    eshorvath 1/2 ton status

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    The relay at the heater blower might be bad. Check this, I have had that go bad on several of my vehicles.
    Just a guess
     
  5. imiceman44

    imiceman44 1 ton status

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    I will check it out tonight and let you know tomorrow
     
  6. milspecjimmy

    milspecjimmy 1/2 ton status

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    kool, thanks a lot
    ~~~jeff
    /forums/images/graemlins/k5.gif
     

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