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    cheef7777's Avatar
    cheef7777 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 27, 2010, 12:56 PM
    Furnace runs no flame
    Furnace constantly runs no flame
    squibnic's Avatar
    squibnic Posts: 11, Reputation: 1
    New Member
    		  
    #2

    Mar 27, 2010, 01:05 PM

    Could be many different things,
    The easiest to do would be clean the flame sensor( a small metal rod next to the pilot opening, with a wire leading to the valve) some fine sandpaper will do.
    Could be the hot surface ignitor


    How old is the furnace?
    It could be the thermocouple if it is an older model

    Could be the gas valve

    Could be the circuit board a lot of possibilities ,

    I'd say clean the flame sensor, if that's not it, call a service tech
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #3

    Mar 27, 2010, 01:37 PM

    Most of the time if it is just the fan on it will either be a stuck limit switch or or pressure switch did not close
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