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Washing machine motor buzzes depending on motor shaft position

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After running a (potentially overloaded) load of heavy towels, I noticed that the tub hadn't drained and that the motor

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Old 04-26-2013, 02:59 PM
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Default Washing machine motor buzzes depending on motor shaft position
Model Number: KAWE860W   Brand: Kitchen Aid   Age: 5 - 10 years   

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After running a (potentially overloaded) load of heavy towels, I noticed that the tub hadn't drained and that the motor was "humming" but the tub was not spinning (or pumping) in any cycle position.

I took the machine apart, expecting to see a broken motor coupler or transmission -- but the coupler and transmission were intact.

I measured the resistances on the 3-windings and they all measured ok (in the typical 1-5 ohm range).

I bypassed the lid safety switch to see if the motor spins and found that in one orientation of the motor shaft, the motor just hummed/buzzed loudly and wouldn't spin at all (or it would eventually start after the humming/buzzing caused it to rotate a bit to a new position). In the other shaft orientations, the motor started though it didn't seem to spin that smoothly (however the motor was loose on the ground with the coupler on so perhaps it is naturally a little unbalanced).

Are there any dirty/worn brushes that could be causing this problem?
Any ideas what might be wrong and how to fix it?
Or do I need to replace the motor? (or is it rebuildable)

Thanks!


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  #2 (permalink)  
Old 04-26-2013, 08:15 PM
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These are induction motors, no brushes nor are they rebuildable. This is a 3 speed motor so there are 4 windings. Need to check the motor while sitting on the floor in agitate mode. If it works ok in agitate but not in drain/spin, you may have a bad lid switch, timer or motor. You would need to take some live line voltage measurements to pinpoint the problem.

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