Question about Panasonic NN-T783SF 1350 Watts Microwave Oven

1 Answer

Microwave stopped itself about 3 second after pressing start

The unit looks normal with display/control panel on. After selecting cook time and pressing start, light and sound came on as if it's working, but after a few seconds the unit shuts off as if time is up. There is no hint that the food had ever been heated up before.

With the lid opened, I can only see one fuse, which still checked out OK (thus display was still on). I suspect some relay decided not to latch, or high voltage did not come on, so controller shut it down -- but I don't know where to check. Please help. Thanks!

Benjamin

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  • Anonymous Jan 15, 2008

    exact same problem with Panasonic NN-S561

  • Anonymous Feb 08, 2008

    My Panasonic NN-T783SF has the same problem. When you press Start after you set the timer, it is only run 22 seconds and stop

  • kpjen Feb 08, 2008

    My Panasonic NN-T783SF have the same problem. When you press start after setting the timer, it's only run 22 seconds and stop. Need Help, Thanks

  • Anonymous Feb 11, 2008

    Seems like a common problem, micro Panosonic NN-T6858F inverter. Shuts down after a few seconds of starting it.



    Would like to get into the back of it, but has tamper proof screws with a pin in the middle. Not sure where I can buy a screw driver like that.

  • nshah60 May 02, 2008

    Same problem.

  • annandme4664 Jul 31, 2008

    yes, I have the same problem. Micro runs for 3 seconds, then stops. It sounds slightly different than normal too. Micro is used about once a day for heating or reheating things. It has not been overly used or abused.

  • songanddance Sep 10, 2008

    My Panasonic NN-S953 has been doing the same thing. It is a large microwave, so we paid a bit more for it. This morning it was working, but was making a slight buzzing noise. Then it stopped heating. Then it would just shut off before the cooking tiem was up. My husband replaced the fuse, but still not heating. Right now it is just a large, expensive clock.

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My panasonic NN-S561 does exactly the same thing

Posted on Jan 15, 2008

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See if this describes what's happening:
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If so, see http://207.234.249.73/mwd/safety.txt , http://207.234.249.73/mwd/disassembly.txt and http://207.234.249.73/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.

That 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.

May 31, 2010 | Panasonic Microwave Ovens

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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.microwavedisplay.com/safety.txt http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/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.


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


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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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:
  • 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.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/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.

If yours is not a Panasonic, please reply back with your brand and model number so we can help you.

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

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1 Answer

Doesn't matter on period of time, it stops after 3 second. After pressing "start", It makes noise three times and stops.


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.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/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.

If yours is not a Panasonic, please reply back with your brand and model number so we can help you.

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

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Microwave turns off by itself after being on for 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://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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