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    Tater68's Avatar
    Tater68 Posts: 1, Reputation: 1
    New Member
     
    #1

    Jan 3, 2013, 12:02 PM
    Furnace ignites but shuts off after 5 seconds
    I have an older Armstrong forced air furnace. Pilot ignites the burners, blower motor runs then burners shut off. Control board is operating, thermostat is operating. There does not seem to be any condensing drain issues. Now what?
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
     
    #2

    Jan 3, 2013, 05:35 PM
    Im not completely familiar with this brand, but if it has a flame sensor, cleaning it will likely solve the problem. If your unit is new enough to have condensing drains, it most likely has a flame sensor.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #3

    Jan 3, 2013, 06:59 PM
    Does the pilot stay on all the time or only when the thermostat is turned up to call for heat?

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