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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 is no heating effect

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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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1 Answer

NN-T563 shuts off after 5 seconds


We recommend you use the below link to locate an authorized service center. Panasonic microwaves have a 5 year warranty on the microwave.

www.panasonic.com/repair

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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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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

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Microwave stops running after 3-5 seconds


hade same problem upper door switch by past it microwave works

Nov 16, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

It stoped


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, 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.

Nov 01, 2008 | Panasonic NN-S542 Microwave Oven

1 Answer

Panasonic NN- A712 combination Microwave 1000w - Switches off after 20 seconds


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

Jul 14, 2008 | Panasonic NN-S753 Microwave Oven

1 Answer

I have Panasonic Microwave (Model NN-P794BF) in silver. I'm using it since last 3 years and never had a problem. Yesterday, suddenly its not working properly. It shuts automatically after exactly 3 second....


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.

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

Jul 13, 2008 | Panasonic Microwave Ovens

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Model # NN-T793/T993


My first guess would be to checvk the venealation fan

Mar 31, 2008 | Panasonic NN-T993SF Microwave Oven

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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

1 Answer

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.

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