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Thermador Range Vent Hood Motor is Loud or Noisy

The part(s) or condition(s) listed below for the symptom Range vent hood motor is loud or noisy 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.

Most Frequent Causes for Range vent hood motor is loud or noisy

For the most accurate results, enter your model number.


Cause 1Exhaust Fan Motor

The exhaust fan motor bearings might be worn out. To determine if the motor bearings are worn out, try wiggling the motor shaft back and forth. The motor shaft should not move at all. If the motor shaft moves even by a slight amount, the motor 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.

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Cause 2Fan Motor

The fan motor bearings might be worn out. To determine if the motor bearings are worn out, try wiggling the motor shaft back and forth. The motor shaft should not move at all. If the motor shaft moves even by a slight amount, the motor 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.

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Cause 3Blower Motor

The exhaust blower motor bearings might be worn out. To determine if the motor bearings are worn out, try wiggling the motor shaft back and forth. The motor shaft should not move at all. If the motor shaft moves even by a slight amount, the motor 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.

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Cause 4Vent Fan Motor

Usually, when the vent fan motor is noisy, 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 vent fan motor.

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Cause 5Blower Wheel

The blower wheel might be worn out and loose on the motor shaft causing it scrape on the fan housing. Check to make sure the wheel is tight on the motor shaft and has not slipped on the shaft causing it to contact the fan housing. If the blower wheel is loose on the motor shaft it should be replaced.

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Cause 6Fan Blade

The fan blade might be worn out and loose on the motor shaft causing it scrape on the fan housing. Check to make sure the blade is tight on the motor shaft and has not slipped on the shaft causing it to contact the fan housing. If the fan blade is loose on the motor shaft it should be replaced.

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