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Posted on Nov 26, 2017
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Panasonic Model NN-H2645F Comes on runes 5 or so seconds and shuts off now and then the turntable will try to run

When I pulled it looked to be a slight burn mark on a white wire going to the turntable motor. I taped the wire rolled the sheet metal so it wont cut the wire again. Re installed it worked for about 6 minutes in 4 different uses. will it run if I unplug the motor? If it will that would prove it's the motor. Will it?

1 Answer

William Miller

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  • Panasonic Master 9,179 Answers
  • Posted on Dec 01, 2017
William Miller
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Joined: Sep 15, 2006
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Diagnosing Panasonic microwave oven stoppages:

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 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.

Or 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://www.microwavecontrol.com/safety.htm
http://www.microwavecontrol.com/disassembly.htm
http://www.microwavecontrol.com/doorsw.htm

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 complexity and 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.

If you have other questions, please feel free to contact me directly (see below). .- William E. Miller, AS-EET
[email protected]
http://www.MicrowaveControl.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

5 Related Answers

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Dec 28, 2006

SOURCE: 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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Devabhakthuni Venkateswara Rao

  • 225 Answers
  • Posted on Sep 29, 2007

SOURCE: 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.

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Oct 22, 2007

SOURCE: Panasonic NN-T694SF smoke, shuts itself off

In most cases, this is a problem with the inverter or a bad transfotmer.

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

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Aug 02, 2008

SOURCE: Panasonic Model NN T964SF inverter

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

Anonymous

  • 1 Answer
  • Posted on Oct 21, 2008

SOURCE: Panasonic Model No. NN-S933BF Microwave Oven

could it be that i didn't follow the manuel because i got it second hand or is it because something is wrong with it,and i have to get it fixed.

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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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Shuts off after approx 5 - 7 sec. some smoke

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

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.
If you prefer to replace the inverter yourself, you can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
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In all likelihood the mangnetron has failed, or perhaps even the Power Supply. or a fault that is shutting the system down for safety reasons 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.
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Microwave Oven shuts off after 5 seconds

What type of microwave is it (make and model)?
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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
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Panasonic Model No. NN-S933BF Microwave Oven

could it be that i didn't follow the manuel because i got it second hand or is it because something is wrong with it,and i have to get it fixed.
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Panasonic NN S254BF

It sounds like one of the wires or serkits are loos so the electrisity is not getting to it all the way I would return it or take it apart and try to fix it your self.
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