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    s10ISmyMONEYpit's Avatar
    s10ISmyMONEYpit Posts: 1, Reputation: 1
    New Member
     
    #1

    Dec 12, 2011, 11:04 AM
    My 2000 Chevy s10zr2 has no heat when it's cold out
    The heat in my s10 works fine when the weather is warm, I can't get it to shut off, even when the controls are turned to off hot air blows in all summer long, but now that the weather is cold the heat will not work, it works fine when I go to work in the afternoon when it's 50 out but when I leave work and night I have no heat, one thing I've noticed is the feed hose to the heater core is hot but he return is cold, so I'm figuring coolant isn't flowing through the core, I don't think the core is clogged though because I can run water through it no problem, also I've noticed what sounds like running water behind the dash when I accelerate, when this happens he heat works briefly, any help would be greatly appreciated Thank you
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
     
    #2

    Dec 12, 2011, 11:31 AM
    Check the heater control valve. It's not uncommon for them to fail.

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