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    gerardo1221972's Avatar
    gerardo1221972 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 10, 2011, 03:34 PM
    Armstrong ultra III 80 turns on fine but main blower motor doesn't turn on
    Blower motor won't circulate heated air what could be wrong
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Feb 11, 2011, 02:24 PM
    Could be a bad fan on switch, bad motor, bad start condenser. Does the motor hum and try to start?
    Theaircoguy's Avatar
    Theaircoguy Posts: 36, Reputation: 0
    Junior Member
    		  
    #3

    Feb 12, 2011, 12:01 AM
    You might have a bad pressure switch, vent pipe might be clogged, fan switch might have gone bad or blower motor is not turning on because of a bad capacitor or fan switch. This is not something you can diagnose on your own.
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