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I have a panisonic inverter microwave that shuts o after running.

I can set the timer to any time lenght but it just shuts of every time the same after running less than 30 seconds. It was working fine yesterday. This has been a good unit and I hate to just throw it away and get another if it can be fixed without too much exspense. What do you think the problem might be?

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  • shovel071 Dec 21, 2008

    I have a Panasonic "Inverter System" 1300 W Model NNS952WF large white microwave manufactured 6/2002. Recently the microwave just shut off after approx 25 secs . Well I decided to remove the cover and check things out, I cleaned it up in rear blew some dust off realized everything looked like a bunch of computer board componets and realized I was above my head. So I put the cover back on and plugged it back in. Now it shuts off under 3 secs. SO my prety microvae sits. I am not sure if it would be worth fixing or buying a new one?

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9098 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

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MicrowaveSvc
  • 9098 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
  • 9098 Answers

SOURCE: Unit runs for 59 seconds and shuts off

This is a problem in one of the damper-related components, most likely the switch or motor, but it may also be the motor or the damper door.

The damper is a door located on the right side of the innards. The damper closes and opens depending on cooking mode.

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

You can order Sharp parts from Tritronics at http://www.wehaveparts.com

You can find a helpful exploded view by entering your model number here: http://www3.sears.com

Posted on Nov 17, 2007

  • 1 Answer

SOURCE: Panasonic NN-S262SF stops cooking after 3 seconds

inverter problem the transistor 1M30D is shorted

Posted on Jan 07, 2009

cactus bob
  • 267 Answers

SOURCE: microwave cut off

the main control board is "seeingf" a high amprage draw from the inverter board . you have a problem with the inverter or the magntron . parts are more than a new unit . try to stay away from the inverter type , there just not ready for prime time . google "panasonic inverter reviews " and you will see just common your problem is good luck

Posted on Jan 17, 2009

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See if this describes what's happening:
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the main control board is "seeingf" a high amprage draw from the inverter board . you have a problem with the inverter or the magntron . parts are more than a new unit . try to stay away from the inverter type , there just not ready for prime time . google "panasonic inverter reviews " and you will see just common your problem is good luck

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