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whirlpol dryer won't start-just hums when I push the start button
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Joined: 9/8/2009(UTC) Posts: 13
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Originally Posted by: Gene A regular simple motor has two windings: start and run, and centrifugal switch. Start winding has a higher torque to start a rotor movement. Power comes to both windings when you push start button. As soon as a rotor got to its normal speed, centrifugal switch interrupts power to start winding while run winding still has it.
If there is something wrong with start winding then rotor can not start rotation because run winding does not have enough torque for it, but because it's powered up - it makes a humming noise.
Gene. thanks Gene, that explains a lot. I am not used to working on that kind of motor, so it taught me something new.
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Joined: 12/4/2009(UTC) Posts: 10
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I found this thread after posting a new one with an identical problem, drum starts with a push and turns freely, but not on its own.
I found other advice elsewhere pointing to motor start capacitor or board, but could not find a capacitor on the model's parts list.
Gene's explanation of the motor sounds very knowledgeable and authoritative, but just wondering before I run out and buy the part and try to install whether these symptoms always point to motor, or how to identify cause with certainty.
Thank you.
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Rank: Advanced Member
Groups: Senior Expert, Administrators Joined: 7/19/2007(UTC) Posts: 27,455
Was thanked: 4 time(s) in 4 post(s)
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Rank: Member
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Joined: 12/4/2009(UTC) Posts: 10
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Thank you, Sir.
My wife will be very happy when she can wash my clothes again:)
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Rank: Advanced Member
Groups: Senior Expert, Administrators Joined: 7/19/2007(UTC) Posts: 27,455
Was thanked: 4 time(s) in 4 post(s)
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You are welcome, Sir. Keep us posted.
Gene.
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Joined: 12/4/2009(UTC) Posts: 10
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Thanks, Gene,
I've gotten as far as attempting to remove the blower wheel, but it will not budge, and wrench slips off the hex on the back of the motor.
I guess I can break it off and get a new one, but not sure the best way to do it?? Is there a trick to getting it off, or what is the best way to break it?
Gary
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Rank: Advanced Member
Groups: Senior Expert, Administrators Joined: 7/19/2007(UTC) Posts: 27,455
Was thanked: 4 time(s) in 4 post(s)
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Originally Posted by: Urbo464 Thanks, Gene,
I've gotten as far as attempting to remove the blower wheel, but it will not budge, and wrench slips off the hex on the back of the motor.
I guess I can break it off and get a new one, but not sure the best way to do it?? Is there a trick to getting it off, or what is the best way to break it?
Gary The blower wheel is threaded on the motor shaft with left-hand thread. In order to remove the blower wheel you need a 1/2" socket wrench driver. If no success, you can break the blower wheel in pieces, using a chisel. This situation is very common and I did it myself many times. - The blower wheel Part number: AP2912089
Gene.
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Rank: Member
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Joined: 12/4/2009(UTC) Posts: 10
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thanks again, Gene, I've ordered the blower wheel. starting out by turning it the wrong way didn't help once I finally figured out the right way. I'll have to chisel it off.
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Rank: Advanced Member
Groups: Senior Expert, Administrators Joined: 7/19/2007(UTC) Posts: 27,455
Was thanked: 4 time(s) in 4 post(s)
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You are welcome. Keep us posted.
Gene.
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Rank: Member
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Joined: 12/4/2009(UTC) Posts: 10
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waiting for blower fan, easy install, motor installed successfully. I'm marking this one a winner on saved labor and parts markup costs of at least 200. educational and gratifying too.
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whirlpol dryer won't start-just hums when I push the start button
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