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New motor making roaring noise when starts up but gets quiet after 3-5 minutes

New motor making roaring noise when starts up but gets quiet after 3-5 minutes

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  #1  
Old 11-26-16, 08:44 AM
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New motor making roaring noise when starts up but gets quiet after 3-5 minutes

New electric motor making roaring noise when starts up but gets quiet after 3-5 minutes. Motor just purchased new online.Can someone help me with this asap? Need to fix this for my pellet stove and need it asap as it is cold.

 
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Old 11-26-16, 09:01 AM
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Spin shaft by hand and see if it feels smooth.
 
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Old 11-26-16, 09:46 AM
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Thank you and spins really easy.
 
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Old 11-26-16, 09:48 AM
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Sounds to me like a replacement for your replacement is in order.

If the motor is defective there isn't much you can do for it.
 
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Old 11-26-16, 04:22 PM
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You didn't say what type of motor. Could be the internal centrifugal start switch is sticking. Bottom line, get a defective replacement/new motor.
 
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Old 11-26-16, 11:40 PM
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Generally a roaring noise is something out of balance or a bad bearing. If yours gets better after a few minutes I'd bet it's a bearing that gets hot and loosens up enough to turn more freely. OK for the short term but it might indicate that it's in for a short life.

Also, since you didn't say what motor you replaced or what it does go through and check to make sure it's installed properly and that nothing is loose. If it's a motor for a fan or blower the fan might be loose and it eventually vibrates and finds it's own balance.
 
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