Question about Microwave Ovens

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I have the combination micro/oven..C-970-419532, s/n NF34332819

Mircowave turntable rotates on start up and the complete system shuts down after approx 4 seconds....I'm getting hungry

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  • 210 Answers

When a microwave oven shuts down prematurely it is often due to a defective high voltage component such as the diode string, a high voltage capacitor or, more likely, a defective magnatron (microwave power generator). If your microwave oven is more than four years old, consider it a sign from God that recalcitrant electronic pariah has yet to burn your house down!

If you are a cheap weasle and willing to possibly die for hot food, you can buy a replacement magnatron and spring new life into that old, slime-filled microwave oven! It's ture! (I've done it.)

There are just four manufacturers in the world for such things and all of them do what they do far from American soil. For about $60 you can beget a repalcement magnatron then wade into the exciting world of microwave energy production, waveguide and antenna theory, and the wonders of high voltage power electronics. (I'd mention embedded microcontroller theory but everyone knows that today.)

On the other hand, a busy executive person or similar form of incurious being would have just gotten off the phone to Best Buy, having been imbued with the many exciting and wife-pleasing possibilites that are innately manifest in a microwave oven you have yet to own.

In short, all your hot food wants is money. Give it money and hot food will be yours again!

Posted on Nov 26, 2014

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rickbrashear
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SOURCE: igniter goes on blower runs

there should be a flame detector sensor. it is in the flame. this will need to be cleaned with a wire brush or scrapped with something to get the carbon build up off of it.
you will see something that in in the flame area that is kind of charred and black with a wire coming out of it.
this is designed to tell the unit that there is a flame present and if that flame is not there after serveral attempts it will shut it down. because it there was no flame there you would get gas fumes pumped into you house.
you could change it out or usually you can just clean it and it will work fine.

hope this helps
rick

Posted on Jul 15, 2011

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The turntable system typically consists of the motor, the coupler, the turntable support with rollers, and the tray.

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If yours is not set to be off via the control panel, and it 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 can find helpful exploded view diagrams and order parts by entering your full model number here, but if your brand is not listed, try Encompass or call them toll-free at 866-779-5835.

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If it heats, but the turntable won't work, the motor is likely bad.

The turntable system consists of the motor, the coupler, the turntable support with rollers, and the tray.

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. In some brands, you have to cut the motor cover off with snips, then use a screw when reassembling it.

We have the complete service manual for this model and have uploaded it to our site here to help you.

You will need the free Acrobat Reader to view or print it in case you don't have it already.

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

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