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My microwave pansonic model NN-N644WF. IT DOESN'T HEAT UP AND I ALSO NOTICED WHEN I SET FOR ONE MINUTE IT STOPS AT 22 SECONDS.

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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. You can find one here.

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

Posted on Jun 29, 2008

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NN-T945SFX CODE H98 RUNS A FEW SECONDS THEN STOPS


There are a number of possible causes.

The following link will take you to a page with the diagnostic flow chart that you can use to troubleshoot this issue:
Microwave Fault Codes

This customers review of that issue may also be of some help:
Customer Reviews Panasonic NN T945SF 2 2 Cubic Foot 1250 Watt Microwave...

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Microwave stops mid cycle


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

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.

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.

Dec 27, 2012 | Panasonic NN-T664SF Microwave Oven

1 Answer

Our Panasonic "the Genius" Model No. NN-S562WF 1200W Microwave has the following problem: We set it for the required minutes, it goes for about 40 seconds then stops - there is no heat happening at all.


hi that is one of 2 possible faults it is either the magnetron or the invertor board (panasonics "great idea" of replacing 3 simple more reliable components (transformer capacitor

Aug 30, 2010 | Panasonic Microwave Ovens

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

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

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?

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3 Answers

Panasonic NN-CS596S Convection Combi Steam Oven


The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

Let us know if the hard reset does not fix it.

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

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

If you do indeed have a problem, Since it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

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 16, 2008 | Panasonic NN-SN657S Microwave Oven

1 Answer

Pansonic model nn-p295 over the range microwave oven


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

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

Nov 28, 2007 | Panasonic NN-P294SF Microwave Oven

3 Answers

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This model uses an inverter to produce high voltage instead of a convential transformer system. 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. Some manufacturers do not encourage or assist technicians to repair microwave inverters. Most offer the inverter as a whole assembly. But sometimes that is actually 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 repair shops and ask then specifically about inverter repair and inverter replacement costs for your model number.

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