where is the heater control valve??

Discussion in 'GMC Truck Forum' started by Rodys95Z71, Jul 27, 2012.

  1. Rodys95Z71

    Rodys95Z71 Full Member

    Joined:
    Dec 14, 2010
    Messages:
    29
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Woodland ca
    for some reason my heater wont turn off. i have tryed evrything to try and stop it. I've talked to several people and they all said that its the heater control valve is stuck. well i try'd to find it and i cant. my haynes guide said that it should be connected hoses going to the heater core. well its not ther the book even showed a picture. i need help and advice cause it gets extremely hot in my truck.
     
  2. dirtrider73068

    dirtrider73068 Moderator
    Staff Member

    Joined:
    Jul 14, 2011
    Messages:
    5,876
    Likes Received:
    3,334
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    dump trucker driver
    Location:
    Central Oklahoma
    What year and model?
     
  3. Rodys95Z71

    Rodys95Z71 Full Member

    Joined:
    Dec 14, 2010
    Messages:
    29
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Woodland ca
    Its a 1995 gmc sierra 1500 4x4 x-cab with 253000 miles on it
     
  4. dirtrider73068

    dirtrider73068 Moderator
    Staff Member

    Joined:
    Jul 14, 2011
    Messages:
    5,876
    Likes Received:
    3,334
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    dump trucker driver
    Location:
    Central Oklahoma
    Your mode door motor may be stuck on hot, if you still have the old style interior, to get to the mode door motor, remove the glove liner, and down left is the mode door motor, it will cost about 100 bucks to replace it. On the dash the temp selection, does it flash arrows if you try to move the temp to cool?
     
  5. Rodys95Z71

    Rodys95Z71 Full Member

    Joined:
    Dec 14, 2010
    Messages:
    29
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Woodland ca
    I have the newer interior. There are no arrows flashing when i move the temp to cool
     
  6. dirtrider73068

    dirtrider73068 Moderator
    Staff Member

    Joined:
    Jul 14, 2011
    Messages:
    5,876
    Likes Received:
    3,334
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    dump trucker driver
    Location:
    Central Oklahoma
    Ok should still be in same location, I don't know how to get to it, but you might be able to feel around for it, should be in the middle of under the dash on the air box.
     
  7. psylosyfer

    psylosyfer Member

    Joined:
    Jul 29, 2012
    Messages:
    9
    Likes Received:
    0
    Trophy Points:
    0
    You can loosen the heater hoses under the hood, run one back to the water pump, and the other to the firewall, this will stop the heat until you figure it out, you can even buy a valve at a hardware store, cut the hose and clamp in the valve. just leave closed all summer, then open for winter, of course I hope you fix the original before that much time passes! HeatBypass.jpg
     
  8. psylosyfer

    psylosyfer Member

    Joined:
    Jul 29, 2012
    Messages:
    9
    Likes Received:
    0
    Trophy Points:
    0
    Check out this pix

    click on pix



    HeatBypass.jpg
     
  9. psylosyfer

    psylosyfer Member

    Joined:
    Jul 29, 2012
    Messages:
    9
    Likes Received:
    0
    Trophy Points:
    0
    skip down to photo it may help for temp fix
     

Share This Page