Question about Panasonic NN-S963BF Microwave Oven

2 Answers

NN-S963BF begins operating when door is opened

Without setting cook power and time our microwave begins operating when the door is opened and stops operating when the door is closed. Seems to heat food fine and not sure if it's cooking when door is opened. Light comes on, tun table rotates and oven makes same sound when it's actually cooking. Any ideas how to fix. We've had this for 10 years without any problems.

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  • Panasonic Master
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The door switch is bad. https://www.partstore.com/Model/Matsushita/Panasonic/NNS963BF.aspx

This site has the most parts. See if there is a contact list so that you can ask about the switch. I dont see it listed as a stand alone item.

Posted on Nov 24, 2013

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  • Master
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Posted on Nov 24, 2013

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Posted on Jan 02, 2017

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SOURCE: Panasonic Microwave oven - cooking operation stops afer 2 seconds

Sounds like a short in the microwave circuit. One or more of the following four components has failed -

Transformer
Magnetron
Diode
Capacitor

Repair is not for the amateur, unless you know how to take things apart, and put them back together EXACTLY as the were found.

Parts are available on the Net, and you can get the P/N's off the old components to identify suppliers of the new ones.

Don't try and measure resistance of the diode. It's impedance is far too high to get a good reading. They're cheap anyway. Always replace the capacitor, they're cheap too. No way to test the magnetron, and the transformer is not easy to test either.

Posted on Jan 16, 2009

MicrowaveSvc
  • 9085 Answers

SOURCE: panasonic microwave nn-s963bf making grinding noise

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 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
order parts for this brand from Encompass (formerly Tritronics). Or you can call them toll-free at 866-779-5835.

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

Posted on Mar 06, 2009

garing
  • 998 Answers

SOURCE: Panasonic Microwave turns on and tray rotates when door is opened

check the door switches

Posted on Aug 16, 2009

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Power Supply

Check whether there is a proper power supply. Look to see whether the cord is connected to a grounded 3-prong outlet and the cord is fully plugged in. If the electrical system is built-in and no power cord is visible, replace or reset the household fuse or circuit breaker.

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Some basic microwave operational steps may affect whether the microwave is heating. Open and close the microwave door, as the unit will not function with the door open, and push "Stop/Clear" to cancel any previous settings, such as the timer, which do not heat the microwave oven.

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Once the power to the microwave has been reset, or verified as working, and the microwave is ready to run, select a new cook cycle and press "Start" to see if the microwave begins to run and cook food as expected. Allow the food to cook for the alloted time and then open the microwave door and check to see if the food has cooked or heated. Choose a longer cooking time and restart the microwave if food is heating but is cooking slowly.

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heatman101

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1 Answer

Panasonic microwave nn-s963bf making grinding noise


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 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
order parts for this brand from Encompass (formerly Tritronics). Or you can call them toll-free at 866-779-5835.

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

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Microwave on its way out?


This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

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If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

If you think the problem is on the control panel, which we repair these nationwide for $39.95 postpaid.

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

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