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    eddie1047's Avatar
    eddie1047 Posts: 4, Reputation: 1
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    #1

    Jan 17, 2010, 09:45 AM
    Pilot light burns burners won't
    The standing pilot light is on but the burners won't ignite. The fan runs. Could a bad thermocouple cause this. I know that there are many other problems possible but this is the cheapest place to start.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jan 17, 2010, 11:07 AM
    If the pilot light is burning the thermocouple probably is OK,does it have a good blue flame? can you hear the gas valve opening, is gas going to the burners and the flame just not reaching or close enough
    eddie1047's Avatar
    eddie1047 Posts: 4, Reputation: 1
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    #3

    Jan 17, 2010, 03:33 PM

    This is my sons furnace and when I looked at it today, the pilot light is a strong blue flame. The burners light, stay on for about a minute, go out, then come back on in a minute or so, with the blower limit switch clicking the burners on and off.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #4

    Jan 17, 2010, 08:39 PM
    OK,, more info is allways a help,, kill the power to furnace,, remove and clean the flame senser with steel wool or fine sandpaper ,reinstall and turn back on the power,, let us know if this helps,,
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