Question about Panasonic NNSD297SR 1200 Watts Microwave Oven

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All the lights work on the microwave, but it will not rotate or heat, It shuts off after 3 seconds. Is it fixable? thanks. Carolyn

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave shuts off after 3 seconds

Although your model number doesn't seem to show up, the NNS950-series units are powered by an high-voltage inverter. And yours has failed. While an inverter (switched-mode power supply) is more efficient from a power consumption standpoint, it is more complex, thus more statistically prone to fail. These should only be examined and worked on by someone who has the necessary technical qualifications. Seriously. Often the machine-soldered connections in a microwave inverter are too weak, so they eventually fail, especially if heat is high in the area. They sometimes fail catastrophically. When not catastrophically damaged, you may hear clicking or squealing and may smell an electrical odor, which is sometimes obscured by the cooling fan. Sometimes a whole new inverter is cheaper than the time and labor required to fix the old one. If a technician is willing and able to troubleshoot and repair the inverter to component level, it will may be expensive, but may be worth it, especially if he or she will resolder and reinforce connections as needed as part of a thorough repair. That could easily make your inverter beter than a new one! You might be able to get some verbal estimates if you call Panasonic-authorized appliance / microwave repair shops and ask then specifically about inverter component-level repair and simple inverter replacement costs for your exact model number.

Posted on Dec 28, 2006

MicrowaveSvc
  • 9047 Answers

SOURCE: On for 2-3 seconds and shuts down with slight wire burning odor.

http://froogle.google.com is showing this model selling for as little as $100. But as a technician, I have never cared for the inverter models. As complexity increases...

Posted on Mar 21, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: Stops working after 38 seconds

This model uses an inverter to produce high voltage. That symptom is an usually indication of a problem with the inverter or a bad magnetron. Due to the lethal voltages involved, I do not recommend that a person without training and experience ever work on these models. You should be able to locate a Panasonic-authorized servicer here: http://www.pasc.panasonic.com/WhereTo/FindServicer.asp?Pass=1 I would mention the exact symptom when you call so the technician can bring a new inverter or magnetron with him when he comes out to repair it. Might save you having it pulled into the shop.

Posted on May 10, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave shuts off

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.

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

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

Posted on Sep 06, 2008

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