Question about Panasonic NN-S543BFW Microwave Oven

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NN -S543BF runs for 23 seconds or so and shuts off and does not h

NN -S543BF

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9086 Answers

SOURCE: My Panaosmic microwave model number

The 22 seconds is the giveaway.

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 with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Aug 08, 2008

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EwingElect
  • 276 Answers

SOURCE: Shuts off after 23 seconds....

In most cases when the microwave stops @ 23 seconds it's the Magnetron which has failed, and is shorting to earth.

Either that or the magnetron isn't getting the right signal from the inverter board. It gives it 20 seconds to get the right signal or it shuts itself off.

Posted on Apr 04, 2009

  • 8404 Answers

SOURCE: just quick working no warning. no power.

Remove the cover and check the fuse that should be on the floor near where the power cord enters the cabinet.

Thanks for your interest n FixYa.com

Posted on Jan 27, 2010

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1 Answer

Will only run for 23 sec, then shuts down. hit reset and it will run for 23 sec again. THis happened after it was exposed to a boiling pot of water. The run time is very consistant before stopping,...


mcdevito75 here, Sounds like the timer mechanism which is most likely transistor board is wet or shorted, see any appliance repair shop in your area for help.Or Check the owners manual for repairs.

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Panasonic NN-T994SF Microwave Oven quits after 15 seconds


my microwave shuts off after a few seconds. is there a fuse that needs replacing?

Feb 01, 2010 | Panasonic NN-T994SF Microwave Oven

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Just quick working no warning. no power.


Remove the cover and check the fuse that should be on the floor near where the power cord enters the cabinet.

Thanks for your interest n FixYa.com

Jan 27, 2010 | Panasonic NN-S543BFW Microwave Oven

1 Answer

Shuts off after 23 seconds....


In most cases when the microwave stops @ 23 seconds it's the Magnetron which has failed, and is shorting to earth.

Either that or the magnetron isn't getting the right signal from the inverter board. It gives it 20 seconds to get the right signal or it shuts itself off.

Apr 04, 2009 | Panasonic Microwave Ovens

1 Answer

Panasonic Model No. NN-S933BF Microwave Oven


No sorry the issue will be with eiher the inverter, the magnetron or the main timer board. There is a tracer signal that comunicates through these components and if it doesnt get to where it is supposed to go it wil just shut off, the big hint at that is the time interval. It is not something like a sensor heating up and causing a fault. it is not running long enough to get any thing hot it is in the electroincs. Too expoensive to repair, im sorry better to get a new one. Good Luck

Jun 17, 2017 | Panasonic NN-S950BA Microwave Oven

1 Answer

My Panaosmic microwave model number NN-S543 just stops after running for 23 seconds. It was running fine for the past 5 years and suddenly yesterday this problem starred. Even the 23 secconds it runs there...


The 22 seconds is the giveaway.

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 with free advice and we'd appreciate your thoughtful rating of our answer.

Aug 05, 2008 | Panasonic Microwave Ovens

3 Answers

Model # NN-T793/T993


My first guess would be to checvk the venealation fan

Mar 31, 2008 | Panasonic NN-T993SF Microwave Oven

2 Answers

Microwave cuts out after 23 secs


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. You can find one here:

http://www2.panasonic.com/webapp/wcs/stores/servlet/vServiceLocator?storeId=15001

Dec 15, 2007 | Panasonic NN-S550WF Microwave Oven

1 Answer

Panasonic NN-S533WF Microwave


because of high voltage circuit thats happend ,please check highvoltage circuit may be short circuit or any companent burntout. check magnetron and high voltage diodes etc.

Sep 29, 2007 | Microwave Ovens

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