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    jtt2630's Avatar
    jtt2630 Posts: 2, Reputation: 1
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    #1

    Jun 18, 2013, 02:08 PM
    Janitrol GMP075-3 main fan runs constant
    My furnace is turned off. I came home and main blower fan was running, t-stat is in the off position and fan switch is in auto. Batteries in t-stat are changed. I turned power off to furnace for five minutes and turned back on, then ten minutes later fan turned on again. Any suggestions would be appreciated
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #2

    Jun 18, 2013, 03:50 PM
    Every time I've seen this happen with this model furnace, the problem has been in the circuit board.
    jtt2630's Avatar
    jtt2630 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Jun 18, 2013, 05:22 PM
    Is there a fan relay that maybe stuck?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #4

    Jun 18, 2013, 07:02 PM
    Its part of the circuit board
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