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    Questions1821's Avatar
    Questions1821 Posts: 1, Reputation: 1
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    #1

    Nov 1, 2010, 02:39 PM
    Why won't heater won't shut down even in off position and passing set temperature ?
    The heater will not shut down whither exceeding set temperature or being turned off. I replaced the thermostat and plugged the heater in again. It started immediately even in the heat off position. Could it be the ignition control or a thermo coupler? I'm not talking about the fan blower but the actual heat. Thanks, Sherri
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Nov 1, 2010, 04:24 PM

    Try unhooking the thermostat wires from the unit itself(not from the actuall thermostat, but the unit). If the burners don't ignite when power is restored after you do this, then I would guess there is a short in the thermostat WIRES. Let me know what happens, and if it doesn't work, please post some pics of your unit(wiring, burners, gas valve, the more the better).
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