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    julius caesar's Avatar
    julius caesar Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 27, 2008, 03:39 AM
    Day & night furnace not heating
    Hi I have a day & night furnace not heating, I took a class in 2002 and learn some but have not practice much and now my house is cold and I like to fix it myself.
    The unit would not heat up so I opened the unit up and found a code for flame roll out sensor bad so I replaced it same rating 350 as the old one. Cleaned the flame sensor, and restarted the unit the unit came on but did not turn off so I unpledged and restarted to reset now the unit is displaying a 31 code does anybody know what could be the problem with this unit please help
    Eric D's Avatar
    Eric D Posts: 98, Reputation: 4
    Junior Member
    		  
    #2

    Jan 27, 2008, 06:25 AM
    Have you checked the inlet and exhaust for blockage? Does the blower fan come on?
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