Question about KitchenAid KCMS1555R Microwave Oven

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Microwave makes noise when turning only in one direction

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It sounds like the turntable motor is failing or the turntable requires its wheels cleaning. If it is the motor, it is a synchronus motor with a plastic gearbox reducing the RPM to about 5. The gears fail when the turntable dish is turned as the motor stalls the shafts.
Replacing the motor is no big deal.
There is usually an inspection cover that can be removed on the underside of the cavity.
Remove the cover and remove the motor.
Replace with the same type and the reverse procedure will fix it.
You may however require a self tapping screw to affix the cover back on. A bit of a puzzle but not too difficult to work out!
Hope this helps.

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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when a microwave quits heating but every thing else is ok normally
investigate these 4 areas

Investigate these three areas if your microwave won't heat but you hear a loud buzzing or humming noise:
microwave_diode.jpg Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

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A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

microwave_magnetron.jpg Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

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I have a JES1142 which I purchased only one month ago. The turning plate rotates both clockwise and counter clockwise. When it rotates counterclockwise it makes a grinding sound. Why does it rotate bot...


It's normal for the motor to turn both ways, that's because of how the motor is made. As for the grinding noise, there's no reason the motor itself would make more noise turning one direction than in the other. The noise might be coming from the roller ring under the glass turntable. One of its wheels might be binding when it tries to turn counterclockwise.

Here's a test. Take the glass tray and roller ring out of the oven. Put a microwave-safe container with a cup or so of water in the oven and start it. Stop the oven and start it again, and the motor should turn the other way. If not, repeat this until you've seen the plastic coupling turn both directions. Note whether you still hear the noise as the motor turns each way. If you do, then there is something wrong with the motor and it should be replaced. If not, the noise is coming from the roller.

In either case, if the oven is truly only a month old it's still under warranty. Since you are concerned about the noise and are worried that the oven is defective, contact the store where you purchased it and see if they will exchange it or take it in for service. If the store can't help you, refer to the owner's manual for the service procedure to follow.

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Remove the cabinet. Turn the oven on its back. Look at the bottom.

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Microwave doesn't heat up


There are three solutions (source) =>

http://www.partselect.com/repair.aspx?appliance=microwave&part=no-heat

Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

High Voltage Capacitor

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Magnetron





A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

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The turn table goes clockwise sometimes & counter clockwise sometimes.It also makes a groumbling noise.


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As for the noise, it is very common that the main turntable wheel track-ring under it is dirty at its wheels, or its pin-pushings have some wear. It is also posssible that the main turntable motor has become noisy from use and age.

I have had microwave ovens make a grumbly sound when one of the cooling fans are going defective.


Jerry G.



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