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Panasonic Inverter Microwave stopped working - no power

I was using the microwave this morning (2 years old only) and use the timer on it when I'm cooking things in the oven. I was busy and must have accidentally set it on 45 mins on High, when I meant it to be the timer. It was on and I didn't notice it with nothing inside it and I noticed a funny smell (probably a burnt out fuse) and it overheated and stopped working.

Is it worth repairing it and is it simply a matter of replacing the fuse?


Thanks
June

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: PANASONIC INVERTER MICROWAVE, 1300 WATTS

  1. Same exact problem
  2. I've noted 3 different ones with the same problem
  3. Panasonic has produced a lemon, north fixing

Posted on Apr 11, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave runs for 3 seconds and shuts off

This is an inverter-driven model, and this is one way the inverter fails. Often it will tick, too, but the cooling fan may be too loud to hear ticking. If you haven't had smoke, then it may not yet catastrophic. I would bet that a thorough resoldering would take care of it. A good technician can troubleshoot and repair this, as needed, but often they will just replace the inverter. Sometimes that's actually cheaper. Troubleshooting an inverter is way too much for someone without good solid technical experience. I would call a shop and ask for an estimate to replace the inverter. Good luck.

Posted on Oct 14, 2006

joust
  • 7 Answers

SOURCE: Panasonic NNC980 - stops working after 3 seconds

you have a bad inverter board.

Posted on Feb 16, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: Panasonic Genius Sensor 1300W

See if this describes what's happening:

  • Put in time, push start and unit runs for 2 seconds, relay clicks, unit goes off. Cook time on display goes off and clock time comes back. Bad upper interlock switch and charred connector
If so, see http://www.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/doorsw.txt

Otherwise, 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.

That may be a loose connection in the wiring between the inverter, magnetron, and/or control board, or maybe one of those components has failed.


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

You can find an authorized Panasonic servicer here.

In Canada, 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.

Posted on Aug 30, 2009

  • 24 Answers

SOURCE: No power. I changed fuse but microwave blows it immediately.

Be very careful! Standard microwaves have 2100volt capacitors and commercial ones 4000 volt capacitors.
*Decharge your capacitor(s) before doing diagnostics*.
You are now testing the high voltage side (as it works on convection). The main components are a transformer, a capacitor, a diode and a magnetron (havent seen a triac in a panasonic residential). If you have a proper meter that can test uf, decharge the capacitor, then test the capacitor, if it reads 0, you need a new capacitor (10$ used typically, 14$ new from ebay). To test the magnetron, decharge the capacitor first, remove the spade connections, test each leg to the frame of the microwave... if it shows measurable resistance, the magnetron is bad. The transformer is not something you test as I personally dont have a 4000 volt meter. If the diode, the magnetron and capacitor are okay, then the transformer is bad. To eliminate any other function, disconnect the low voltage to the transformer run a micropower cycle and check the fuse.
Hope that helps. My first instinct is the capacitor.

Posted on Dec 19, 2009

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Even though these are different symptoms, the same part may be causing both.

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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.

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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.

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