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

    Feb 12, 2008, 06:13 PM
    Heater won't come on
    My gas heater ultra sx 80 (Manufactured by Armstrong Air conditioning Inc.) started to come on and off the other night. It would start up just like normal; flames would come on, but then after a minute or two it would shut-off. Next, the pilot would turn on again just seconds after shutting off. This would repeat a few times then the fan would come on for a few minutes then shut back down. I vacuumed out the unit, put in a new filter and it ran normally for an evening and now it will not turn on at all:confused:
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Feb 12, 2008, 07:53 PM
    Clean the flame sensor

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