Question about Panasonic NN-S553 1350 Watts Microwave Oven

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My panasonic inverter microwave turns itself off after about 25sec can restart and does it again does any one have a clue what could be wrong

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: panasonic inverter microwave

H95, H97, H98 or H99 mean that there's a problem with your inverter, magnetron, or digital programming circuit.

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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.

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

Posted on Dec 28, 2008

SOURCE: Panasonic Microwave about 9 years old with

In all likelihood the mangnetron is failing, or perhaps even the Power Supply is faulty. You need to have it serviced by a reputable service centre/man.
Ensure you get a firm "Quote" before proceeding, and remember these days the cost of repair can equal or exceed the price of a new one.

Posted on Jan 28, 2010

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MicrowaveSvc
  • 9047 Answers

SOURCE: Panasonic microwave shuts off

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.

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.

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

Posted on Dec 25, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: inverter microwave stopsafter 25sec no

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.

Posted on Jun 08, 2009

pgh_pa_guy
  • 2992 Answers

SOURCE: My Panasonic Inverter Genius Sensor 1250W Lights

This is most likely because of a faulty interlock monitor switch, operated by the door latch. If it thinks you're running the oven with the door open it will cause the fuse to blow (or trip a circuit breaker in your case). The switch may be bad (not opening as it should when the door is closed) or out of adjustment.

The switch is replaceable and it's not a costly part. You should have microwave service done by a professional, especially if it involves the door. There are potentially lethal voltages present with the cover off, and the possibility of microwave leakage is the repairs aren't dome properly.

Hope this gets you cooking again. Thanks for using Fixya!

Posted on Feb 17, 2010

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Hi, if it is an inverter microwave and the problem is cycling every 2-3 seconds, my experience is the magnetron has most likely gone short circuit and the inverter board is shutting down to protect itself and then restarting, hence your symptom.
DO NOT try to test this unless you are experienced with extra high voltages - the voltages present/stored in a microwave even when powered off can kill you.

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Inverter microwave stopsafter 25sec no matter what the setting and nothings hot


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.

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See if this describes what's happening:
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If so, see http://www.microwavedisplay.com/safety.txt and
http://www.microwavedisplay.com/disassembly.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.

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The high-voltage transformer (or inverter transformer) has probably failed.

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

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