Blower motor not starting

Discussion in 'HVAC Heating & Cooling' started by jdhoffman, Aug 30, 2016.

  1. jdhoffman

    jdhoffman New Member

    Aug 29, 2016
    Furnace blower motor hums when it's not running. It turns on when it's supposed to, runs and shuts down just fine. Is it the capacitor?
  2. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
    Not the capacitor, based on your description. I suspect the hum is not from the blower. Feel around. It might be the transformer used for the control power.

    If the hum is from the motor, and you could disconnect the motor to see if that stops the hum, the problem is with the control system. I am not a pro.
    Last edited: Aug 30, 2016
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  4. DonL

    DonL Jack of all trades Master of one

    Mar 30, 2011
    Rocket Scientist
    Houston, TX
    Reach sounds correct.

    "Blower motor not starting.
    It turns on when it's supposed to, runs and shuts down just fine."

    Do Watt ?

    Some transformer hum is normal if the transformer has power.

    The reason that they hum is because they forgot the words.

    Good Luck.
    Last edited: Aug 30, 2016
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