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

    Mar 29, 2009, 10:24 AM
    Why is my furnace humming?
    My furnace makes a humming noise every 10 minutes. The heat is still blowing so the furnace is still working. The sound only last for about 7 or 8 seconds. It sounds like when you turn the microwave oven on. Please tell me what the problem is.
    MarkwithaK's Avatar
    MarkwithaK Posts: 955, Reputation: 107
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    #2

    Mar 29, 2009, 01:49 PM
    It's humming because it doesn't know the words! :D

    Seriously though, it cold be the blower motor getting weak and not starting up right away. I would check the capacitor first though.
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