Question about Panasonic NN-S254BF Microwave Oven

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Stops after 3 seconds - Panasonic NN-S252BF

What ever time we set it stops after 3 or 4 seconds.
Tried several times but the problem still remains as is.

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  • 3 more comments 
  • johnro2 Aug 16, 2008

    Mine is the NN-S960BC and it stops after 5 seconds no matter what I set the timer to.....even the sensor reheat buttons.

  • sheri1957 Feb 01, 2009

    My Panasonic over the range microwave stops after 3 seconds, and turns timer off as if cooking is completed. It occasionally (rarely) works properly for a short time, then goes back to turning off. Any ideas on how to fix this? And where can I get a diagram of this microwave, so I can find the fuses, etc.?

  • Anonymous Feb 14, 2009

    3 seconds

  • nuvista May 11, 2010

    Where is the high voltage capacitor for the over the range Panasonic microwave NN-H275BF

  • Anonymous Mar 23, 2014

    starts stops after 3 seconds

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  • 224 Answers

May be magnetron spoiled or high voltage section problem,please check circuit andreplace damage parts...

Posted on Aug 18, 2008

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1 Answer

My panasonic microwave NN-S954WF will run a few seconds and then stop. What should I check?


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

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

If it stops after 7 seconds, it has a problem with the inverter.

If it stops at 2-3 seconds, 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://031d26d.namesecurehost.com/mwd/safety.txt http://031d26d.namesecurehost.com/mwd/disassembly.txt http://031d26d.namesecurehost.com/mwd/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.

It 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.

Nov 16, 2011 | Panasonic NN-S954WF Microwave Oven

1 Answer

The oven stops partway into the set time, and doesn't heat.


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

Jun 11, 2009 | Panasonic Microwave Ovens

2 Answers

Our microwave oven Panasonic NN-S252WF stops after


Our technician suggest that there may be a problem with the Inverter Board in this model, which is something that would need to be looked at by a Service Center.

In rare cases it could be the door switches.

Mar 27, 2009 | Panasonic NN-S252WF Microwave Oven

1 Answer

Microwave works for 5 seconds


"h98" INTERNAL ICU FAILURE" main control board has failed . will cost 3/4 of the cost of the microwave itself .......... get a new microwave

Jan 22, 2009 | Microwave Ovens

2 Answers

Stopped heating, shuts off before time expires


My panasonic microwave model # NN-S540BFW stops after 4 seconds after you hit the start button and cuts off on its own. What is wrong with my microwave?

Jan 12, 2009 | Panasonic NN-S763BF Microwave Oven

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

Jun 03, 2008 | Panasonic NN-T994SF Microwave Oven

1 Answer

Microwave runs for a few seconds then stops


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.

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

Jun 01, 2008 | Panasonic NN-S962 Microwave Oven

2 Answers

Panasonic NN-S262SF stops cooking after 3 seconds


inverter problem the transistor 1M30D is shorted

May 28, 2008 | Panasonic NN-S262SF Microwave Oven

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