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

    Dec 2, 2009, 04:43 PM
    Forced air furnace who's pilot won't stay lit, not the thermocouple
    Pilot won't stay lit beyond releasing the button to light it. Replaced the thermocouple--same result. 45 year old Pioneer heater. Tested for power at the transformer--OK. What next?
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #2

    Dec 2, 2009, 04:59 PM

    Is the pilot flame touching the thermocouple, and is the thermocouple positioned properly? Only 1/4"-3/8" of the tip should be in the pilot flame. If the gas control has an E.C.O. device (look for 2 wires sticking out just below the thermocouple connection), it may have failed. Otherwise, the safety coil circuit in the gas control has failed.
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