Turntable turns, but in a constant jerking motion. The plate ring turns free so there is no binding.

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The turntable is driven by a small electric motor mounted underneath the cabinet. The motor may have failed. Also check whether the rotating plate was binding which also causes failure of the motor

The turntable motor in the microwave oven needs to be replaced.

Hmm .. if it is the turntable that is making the noise, then remove the plate and the guide ring. Wash all the parts, and the track that the guide ring sits in and then all back together ..

hmmm? me's thinking about this one!!!!
the glass plate has drive dogs on the bottom of it, that fit into drive dogs on the turn table, if its not meshed up right it just spins freely and normaly throw's the glass plat off??? are the bearing that are under the glass plate turning freely? thats the big ring that the plate rides on near the out side edge of the plate, and can be taken out for cleaning??? it looks like a hoop with 3 or 4 rollers in it??? if you forgot to put this bit back in the right way up after cleaning it thats the problem???

Sounds like the "hub" for the turntable is worn. either that or the actual turntable motor. also insure the "plate" has a ring under it with wheels. sometimes I find those missing which in turn put far too much loud on the hub & motor, hence wearing them out pre-maturely.

you should be able to pull the hub out from inside the oven, if not. remove the filters below and if you twist just right you should see a small round device mounted with two tiny philips head screws, that's the turntable motor. It's usually the "hub" that wears though, so it's likely an easy fix. The most difficult part may be finding the new replacement part itself.

hope that helps,

good luck

It could be a failing fan motor or magnetron.

While a microwave should never be left running unattended under any circumstances (as your owner's manual will tell you) it's even more important when one is exhibiting a failure or any odd behavior. So play it safe and stay with it while it's running!

And, as with anything that is not working right, it should be fixed as soon as possible or it can get worse.

If it's less than one year old, it would be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

GE Customer Service is here.

Let us know if we can help further.

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

The turntable motor on the base of the machine may have failed. Take the plate out, put a small plastic jug of water in the microwave corner (out of the way of any roller), set for 30 seconds, and see if the spiggot/roller ring rotates. It also could be the spindle of the turntable motor has broken off in the spigott/roller ring.

You may have a tunrtable motor or spindle problem..
This info is from GE website..( link : http://genet.geappliances.com/geasearch/Dispatcher?REQUEST=GETSEARCHRESULT

To minimize the possibility of electric shock, unplug this appliance from the power supply before attempting any maintenance or cleaning.

• Make sure the turntable is centered and seated properly. On models with a stirrer motor there is a shaft protruding up through the floor of the microwave. Make sure the turntable is securely fastened to this shaft. On models that turn on a ring with wheels attached, make sure the turntable is seated securely on the ring.

• Check the turntable to make sure it is placed right side up. If the turntable plate is upside down it will drag on the floor of the microwave.

• Check to make sure that there is no food or debris under the "wheels" of the turntable ring. Food can prevent the wheels from moving forward.

• Be certain you are pressing a cook function rather than a timer function.

• If the microwave has a turntable on/off feature make sure the turntable was not inadvertently turned off. Try depressing the turntable on/off pad to re-engage the turntable.

I know this is probably DUMB of me to say, But some with this type of turntable arrangement, The ring would only set one way. The ring did not turn, but rather the wheels faced up and rolled with, and supported the turntable.