Question about Panasonic Microwave Ovens

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Nn sd466m Why does it stop after a few seconds and not heat?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Panasonic NN-T994SF Microwave Oven quits after 15 seconds

my microwave shuts off after a few seconds. is there a fuse that needs replacing?

Posted on Nov 24, 2010

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heatman101
  • 43501 Answers

SOURCE: Panasonic NN-H665BF starts and will

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 [
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Posted on Aug 13, 2011

MicrowaveSvc
  • 9047 Answers

SOURCE: My panasonic microwave NN-S954WF will run a few seconds and then stop. What should I check?

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 it stops at 2-3 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://031d26d.namesecurehost.com/mwd/safety.txt http://031d26d.namesecurehost.com/mwd/disassembly.txt http://031d26d.namesecurehost.com/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.

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.

Posted on Nov 26, 2011

  • 6771 Answers

SOURCE: NN-T945SFX

The thermal fuse may be defective, monitors temperature of the magnetron, or the internal fan may not be operating properly, it is possible the magnetron may have a shorted winding.

Posted on Mar 23, 2012

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SOURCE: my panasonic microwave NN-772SBBPQ works for about 12 seconds does not heat and stops

This indicates a short in the keypad membrane that is attached to the control board, depending on age, replacement of the microwave oven might be a better option.

Posted on Apr 01, 2012

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Panasonic NN-H665BF starts and will run for about 5 seconds and then stops without heating up anything.


Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 [
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usually this is the temeperature sensor that is faulty or that you have pushed the unit back against the wall too far and not enough airflow to allow it to remain within the tolerence levels of heat generation.

New sensor is about $30.


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Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

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Panasonic Microwave Oven Stops After 15 seconds - Never Heats


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

You can order Panasonic parts from Tritronics.

If you reconsider, 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.

Oct 21, 2008 | Microwave Ovens

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