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    cathguer's Avatar
    cathguer Posts: 1, Reputation: 1
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    #1

    Feb 14, 2018, 08:25 AM
    Fan motor does not work on auto but works pn ON
    Lenox heater whisper 20 series blower motor will not work when placed on aoto but will operate when placed in the ON position
    talaniman's Avatar
    talaniman Posts: 54,327, Reputation: 10855
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    #2

    Feb 14, 2018, 06:35 PM
    It could be ANYTHING from a bad thermostat, loose wire, temperature switch, control board, or any of a dozen things and I can only recommend a tech to go through the PROCESS of checking your electronic components.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #3

    Feb 14, 2018, 08:10 PM
    We know the motor is OK. The relay is working so I would check the fan control switch. Could be a thermostat but they usually fail all the way. Not sure if there is a separate switch or if it in the control board.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #4

    Feb 15, 2018, 11:36 AM
    Probably a stupid answer. But On works no mater what the temp is. Auto Comes on when Heat or Cool is selected And temperature is set to operate?

    When set to Cool, Does Compressor Kick in?
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