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Runs for three seconds then shuts down. Model NN-S952

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If the digital programmer circuit / controller does not get a feedback signal from the inverter for a period of 3 seconds, the controller will stop the cook cycle.

In most cases, this is a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer.

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

Posted on Aug 02, 2008

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MY PANOSONIC INVERTER SHUTS DOWN AFTER 14 SECONDS MODEL # NNCD989S


Check again.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor.

Order Panasonic parts from Encompass here or you can call them toll-free at 866-779-5835.

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In all likelihood the mangnetron has failed, or perhaps even the Power Supply. or a fault that is shutting the system down for safety reasons You need to have it serviced by a reputable service centre/man. Ensure you get a firm "Quote" before proceeding, and remember these days the cost of repair can equal or exceed the price of a new one.


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In all likelihood the mangnetron has failed, or perhaps even the Power Supply. or a fault that is shutting the system down for safety reasons You need to have it serviced by a reputable service centre/man.
Ensure you get a firm "Quote" before proceeding, and remember these days the cost of repair can equal or exceed the price of a new one.

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1 Answer

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May 13, 2009 | Panasonic NN-S952 Microwave Oven

1 Answer

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My mother had the same problem and she was going to trash it. Me being an extreme environmentalist, dint wanna let it go to the scrapyard. Got it down to Mumbai India checked with the engineers down here and rectified it. Problem was with the Magnatron. You would need to replace it. Well this one's getting repaired and off to a institution in need like the Home for the Aged rather than some scrapyard.

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1 Answer

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If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

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

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1 Answer

Panasonic NN-T994SF 1250 watt countertop microwave stopping


From my research, this sounds like a fairly new model. Consult your user's manual to see if this is a user, or common issue. If nothing is descibed then I would seek possible warranty service, or dealer replacement

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1 Answer

Panasonic NN S254BF


It sounds like one of the wires or serkits are loos so the electrisity is not getting to it all the way I would return it or take it apart and try to fix it your self.

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