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Kenmore microwave 721.80803401 rotating table pops up and stops turning.

Our Kenmore 721.80803401 is approximately 3 years old and has had the same problem from day one. The rotating/sliding table jumps up and completely disengages from the rotating arm. As some others have noted, the problem will come and go, sometimes occurring frequently and then will disappear for several weeks. I have completely removed/inspected the table assembly from the microwave but have not been able to identify any sticking/damaged parts. The only questionable thing I found was that the rotating arm would sometimes pop out of its center hole, completely disengaging from the internal rotating mechanism. This would definitely cause the table assembly to stop turning and drop out mechanical time with the motor. I have been carefully inspecting the arm to make sure it is inserted completely but the problem has still been occurring.
When the table assembly pops up, the cooking liquid will often spill all over the glass plate resulting in a big clean-up. Other times we will be out of the room and not notice that the rotating table has stopped and the food will not cook properly.
If anyone has solved this problem, please post the solution as I am just about frustrated to the point of replacing this microwave/range hood.

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  • derajm Jan 17, 2009

    Since posting this problem on Dec. 21, 2008, I have been researching possible fixes. Several experts have suggested replacing the complete glass tray and rotating-arm assembly but paying 60 dollars plus shipping seemed to be a large investment for this three year old microwave. A diagram of the rotating arm, showed that it had been redesigned with an additional wheel which should prevent the rotating arm from disengaging from the slot in the bottom of the glass tray.

    RepairClinic.com offers the part (item #1327966 ring assembly) for 10 dollars plus 5 dollars shipping. I took a chance, replaced the part and bam! no more problems.

    Why does the consumer have to pay for the mistakes of the manufacturer? It's obvious that the manufacturer redesigned the complete assembly because of this reported problem.

    Another thing to keep in mind is that there may be more than one problem with the tray assembly and that is why the experts have suggested replacing the complete assembly. The good news for me is that the 10 dollar part fixed my problem.

  • derajm Jan 17, 2009

    Guru's recommendation fixed my problem. Tritronics does offer the part but because it is not an in-stock item, it ends up costing twenty dollars plus. Also, the company does not post a picture of the new part which I wanted to see in order to determine if the part had been redesigned. RepairClinic.com has the part in stock (item #1327966 ring assembly) for 10 dollars with a picture included.

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I would bet the arm ("ring assembly") is either worn or warped from heat? and is not meshing well with the motor shaft or glass tray.

That is part number 4351W1A003A and you can get it for only $6.30 (compared to over sixteen via Sears) from Tritronics.

The motor is part # 6549W1S018C and if it's the culprit, you can get that for $24.84 from Tritronics, compared to almost thirty-two from Sears.

You should look again and see how loose the arm is on the shaft and which might be worn or warped or out of perpendicular. I think that one of these is the problem.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Dec 21, 2008

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The motor is part # 6549W1S018C and if it's the culprit, you can get that for $24.84 from Tritronics, compared to almost thirty-two from Sears.

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