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Customer Questions and Answers for Rotor Position Sensor Switch by LG

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    • Part Number: AP4440680
    • MFG Part Number: 6501KW2002A
    • Made by: LG
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For LG Rotor Position Sensor Switch (Part Number: AP4440680)

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At wash cycle start, the tub begins filling with water. After about 2 minutes, it attempts to turn the tub one-way, then the other. As it is trying to turn, it moves a degree or two and stops as if it has met resistance. After a minute or two of this it stops and error message LE is displayed. Note-the tub does turn easily by hand, either direction. I doubt this has any bearing, but the unit makes a noise as it is attempting to turn CCW. The noise most resembles the sound of a copper water pipe system just barely turned on-like water flowing. It makes little noise as it attempts to turn CW. I've unplugged the unit and left it unplugged for 2-3 minutes and turned the tub 3-4 revolutions in each direction, with no perceivable difference in effort. This seemingly began with no warning. Update: I have now removed the rear cover and can freely turn the drum. I do see reddish/rust colored dust at the 5 & 7 o’clock positions on the metal plate, which is secured by numerous bolts to the rear of the plastic drum. I see no visible damage to rotor or stator. The stator has @ 8.5 ohms on the three wires, checking from one to another. The rotor had a very slight dust on it but otherwise appeared OK. When a cycle is started, and if I anticipate the direction the drum will turn next and start it turning by hand, it will pick up on its own. Otherwise, when it attempts to turn, it “locks down” as if held by some force (magnetic, I suppose). I do see reddish/rust colored dust at the 5 & 7 o’clock positions on the metal plate, which is secured by numerous bolts to the rear of the plastic drum. Thanks for your help!

L.g. for Model Number LG WM2277HW

ANSWER Hello L.G., This sounds like the motor has dropped a phase. It is a three phase motor. If one phase is lost, the motor will make a growling noise and cannot start up satisfactorily. Also, the rust colored dust is the indication of a seal leaking. This would require the replacement of the motor stator windings 4417FA1994G and the replacement of the back half of the outer tub assembly AJQ35154201

Answered by AppliancePartsPros.com   |   Monday, December 30, 2013

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