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Panasonic microwave won't heat.

The unit starts as usual but quits after 8 seconds with no sign of heating. No previous problems.

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  • Anonymous Mar 02, 2008

    same prob

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  • 98 Answers

Unscrew the unit replace fuse near the transformer "

Posted on Feb 05, 2008

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1 Answer

Panasonic NN-T545WF switches off after 3 seconds


The possible reasons are :

Microwave diode used is bad.

AC filter cap in the unit is bad.

Inverter board that powers the Magnetron that does the heating is bad.

Or the Magnetron itself is bad.

To know what any look like just Google the item name with "photo"

Dec 23, 2012 | Panasonic Microwave Ovens

3 Answers

Panasonic NN-S563 no heat


hmmm...well..did you do a power setting? that is what is needed in the sequence just stated..try one of the presets like popcorn, to see if that works.

Oct 19, 2008 | Panasonic NN-S563 Microwave Oven

1 Answer

Model NN-6603A unit won't heat


If the microwave oven is 7 years old or less, the cause is a bad magnetron, or the inverter board is malfunctioning, due to cost in parts and labour cheaper to replace.

Jun 29, 2012 | Panasonic Microwave Ovens

1 Answer

Microwave light stays on and unit won't heat/run


If it's not heating at all, the magnetron is to blame.

May 26, 2012 | GE JVM1330BW/WW Microwave Oven

2 Answers

Our microwave has stopped working for the second time in two years. When you try to heat something, it hums but not quite like it is heating. There is also a funny smell.


SAFTY FIRST

UN -PLUG IT,,,,, THAT "FUNNY SMELL" SOUNDS LIKE IT IS SHORTING OUT
PERHAPS THE MEGATRON HAS GONE BAD, THE MEGATRON IS THE
HEART OF ANY MICROWAVE
AS A EX- FIREMAN, I KNOW FROM FIRST HAND EXPERIENCE THAT
"A FUNNY SMELL " OR " UN-USUALL SMELL COMING FROM AN ELECTRICAL
ITEM IS A SIGN OF DANGER

Feb 05, 2011 | GE Profile Spacemaker JVM1871 Microwave...

1 Answer

The microwave starts, then stops after a few seconds, and smells


Remove the cover after pulling the power plug. Check the transformer and large capacitor for signs of overheating. If they look ok, then remove the sheet metal wave-guide from the area where the energy enters the cooking cavity. Under the wave guide is a fan-like device called a stirrer that has a plastic bearing. This stirrer bearing is commonly arced over (when the oven is operated with nothing to heat in it). Usually the bearing looks good, but has arced internally. Replace the stirrer as a unit. The machine can be operated with the case off and a cup of water for a load, but keep you hands clear. Look for smoke.

Sep 07, 2009 | Panasonic NN-H504WF Microwave Oven

1 Answer

Microwave NN - T290SA starts but shuts off after a few seconds. Is it worth repairing?


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.


Please rate our help to keep Free service online ++++ Thanjks for using Fixya

Sep 02, 2009 | Panasonic NN-T790SA Microwave Oven

1 Answer

Comes on for 5 Secs


Hi I am Vortash sounds to me as if the Magnetron is burning out and the heat sensor switch is turning the unit off as the mag gets hot ? .. you can get a cheap replacement of ebay but to be honnest microwaves are so cheap now you will probably get an oven for what you would pay for a new magnetron .. Regards Vortash

May 20, 2009 | Panasonic NN-S262SF Microwave Oven

1 Answer

Panasonic Microwave only works for 37 secs no matter what time setting


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

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.

Jan 04, 2009 | Microwave Ovens

1 Answer

Oven won't heat and shuts down after approx. 20 seconds


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

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.


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

Dec 18, 2008 | Panasonic NN-S763BF Microwave Oven

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