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Range Vent Hood Motor Hums

The part(s) or condition(s) listed below for the symptom Range vent hood motor hums are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

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    Most Frequent Causes for Range vent hood motor hums

    For the most accurate results, enter your model number.


    Cause 1Exhaust Fan Motor

    Usually, when the blower motor hums but does not turn, it indicates that the motor shaft bearings are worn out. Some older, larger motors have oil spouts. If your motor has oil spouts, try adding oil to the motor bearings to get the fan to turn freely. If lubricating the motor bearings does not solve the problem, or if the motor can’t be lubricated, replace the exhaust fan motor.

    Parts
    Cause 2Fan Motor

    Usually, when the blower motor hums but does not turn, it indicates that the motor shaft bearings are worn out. Some older, larger motors have oil spouts. If your motor has oil spouts, try adding oil to the motor bearings to get the fan to turn freely. If lubricating the motor bearings does not solve the problem, or if the motor can’t be lubricated, replace the fan motor.

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    Cause 3Blower Motor

    Usually, when the blower motor hums but does not turn, it indicates that the motor shaft bearings are worn out. Some older, larger motors have oil spouts. If your motor has oil spouts, try adding oil to the motor bearings to get the fan to turn freely. If lubricating the motor bearings does not solve the problem, or if the motor can’t be lubricated, replace the blower motor.

    Parts
    Cause 4Blower Wheel and Housing

    One possibility is that something is caught in the blower wheel. It is also possible that the blower wheel is rubbing against the blower housing. To determine if the blower wheel is at fault, try spinning the blower fan by hand. If the blower wheel does not spin freely, check for the blower wheel for obstructions. In addition, ensure that the blower wheel is not rubbing against the blower housing. If the blower wheel is clear of obstructions, but it still doesn’t spin freely, replace the blower wheel and housing.

    Parts
    Cause 5Blower Wheel

    One possibility is that something is caught in the blower wheel. It is also possible that the blower wheel is rubbing against the blower housing. To determine if the blower wheel is at fault, try spinning the blower fan by hand. If the blower wheel does not spin freely, check for the blower wheel for obstructions. In addition, ensure that the blower wheel is not rubbing against the blower housing. If the blower wheel is clear of obstructions, but it still doesn’t spin freely, replace the blower wheel.

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    Cause 6Fan Blade

    Ensure that the fan blade turns freely. If the fan does not turn freely, check to see if the fan blade is rubbing against the blower housing. Inspect the fan blade for damage. If the fan blade is damaged, replace it.

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