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Sharp R7N78 microwave oven

Not cooking turntable not rotating

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  • Microwave Ovens Master
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Since it's not heating AND the turntable is not turning, it's almost certainly a bad door switch or possibly a bad door switch mount.

Here are some helpful links:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

Info on ordering Sharp UK parts / spares is here.

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

Posted on Nov 08, 2008

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From your description you have a bad door switch, there are usually a few of them located inside the microwave under the keypad control board that will need a digital meter to trouble shoot.

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If by not turning mean turntable fault,the solution is given below in detail.

1 Press "Stop" to halt microwave operation.

2 Press the "Turntable" button once to turn off rotation.

3 Push the door-release button to open the microwave oven if you do not have a "Turntable" button on your control keypad.

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That particular skillet is just too heavy a load for the turntable system to handle.

I would suggest a lighter skillet or a different container, otherwise, the motor or shaft or both will be damaged.

It is of course perfectly okay to put metal in a microwave (after all, that's what they're made of!) but you just have to do it only according to the instructions in the owner's manual.

And as you know, metal in convection mode poses no problem at all.

You just need to use a lighter or different container.

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

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You can see and hear a video of how a turntable motor should sound when you rotate it by hand.

If yours won't rotate or it sounds like it's grinding, etc., you may have a bad motor or plastic coupler.

To replace either, you need to unplug power, then remove the bottom cover of the oven. You may have to cut the cover off with snips, then use a screw when reassembling it.

We have the full service manual for this oven, and have uploaded it to our site here.

The best place to order Sharp parts is Tritronics.

We're happy to help and we appreciate your thoughtful rating of our answer.

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I would guess that one scenario that could cause it would be if the turntable were turned off via the control panel, but there was a switch or switch mount problem.

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