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Why won't my heater work?????? Please help

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by chevrolet21, Sep 29, 2002.

  1. chevrolet21

    chevrolet21 Registered Member

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    Why won\'t my heater work?????? Please help

    I just replaced my heater core and thermostat in my 85 k-10. The blower functions great but all it blows out is cool air. What else could i replace or fix to get this thing to blow hot?????
     
  2. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    Re: Why won\'t my heater work?????? Please help

    check and make sure the hot cold cable is opening and closing the vent right
     
  3. or2play

    or2play 1/2 ton status

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    Re: Why won\'t my heater work?????? Please help

    If your heater hoses aren't hooked up right you won't get any hot air.
     
  4. chevrolet21

    chevrolet21 Registered Member

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    Re: Why won\'t my heater work?????? Please help

    i only have 2 heater hoses right? I tried switching them around on the heater core but either way no heat!
     
  5. trouble1

    trouble1 1/2 ton status

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    Re: Why won\'t my heater work?????? Please help

    Run your blazer for a while and make sure your heater hoses are getting warm(yes 2), if they are than you probably have a problem with your slide switch from hot to cold....if you remove the glovebox you can see it right behind where you took the glove box from. Sometimes you will see the slide moving but that wont actually be turning the bar its hooked up to..(thats my problem) I took a pair of plyers and just manully cranked mine back and forth a few times and it freed it up, then rehooked the linkage back to it. It works great now...I'm sure I just confused you, I confused myself when I tried to read this but its the best I know to explain it...Good luck
     
  6. chevrolet21

    chevrolet21 Registered Member

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    Re: Why won\'t my heater work?????? Please help

    actually you didn't confuse me at all! I'll give it a try tomorrow. thanks
     
  7. tomseviltwin

    tomseviltwin 1/2 ton status

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    Re: Why won\'t my heater work?????? Please help

    Is your radiator full of coolant? The heater blows cold right before the engine siezes (don't ask) /forums/images/icons/wink.gif
     
  8. chevrolet21

    chevrolet21 Registered Member

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    Re: Why won\'t my heater work?????? Please help

    Hope your just joking??? Yes the radiator is full of fresh coolant
     
  9. chevyracing

    chevyracing 1/2 ton status

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    Re: Why won\'t my heater work?????? Please help

    Remove the radiator cap, fire up the engine and let it run till it gets warm. You more than likely have an air lock in the system. You have to bleed it off. Just let the engine run for about half an hour or so with no cap. You may get a volcanoe of water from the radiator, that is okay, that just means the air lock let loose.

    John
     
  10. chevrolet21

    chevrolet21 Registered Member

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    Re: Why won\'t my heater work?????? Please help

    Thanks alot everybody. I fixed the problem from all you guys advise! Thanks again /forums/images/icons/smile.gif
     
  11. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    Re: Why won\'t my heater work?????? Please help

    what was it?
     
  12. chevrolet21

    chevrolet21 Registered Member

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    Re: Why won\'t my heater work?????? Please help

    It was the hot and cold cable just like you said it probably was! The cable wasn't attached to anything, so in turn it wasn't working. Thanks you the man!!!
     
  13. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    Re: Why won\'t my heater work?????? Please help

    no problem glad you got some heat now /forums/images/icons/smile.gif
     

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