Question about Panasonic NN-T694SF Microwave Oven

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Panasonic NN-T694SF smoke, shuts itself off

Panasonic NN-T694SF. After 2 years, now in about 5-10 sec. burning smell, little smoke and Oven shuts itself off. Any advise ? Is this model DIY friendly ?

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  • regionseven Dec 13, 2008

    We have the identical problem and have owned ours about the same length of time. Ours lists 1250W instead of 1300. Do you have any idea how much this will cost to fix?

  • Anonymous Mar 15, 2014

    I have a panasonic microwave grill oven NN-K652 and it is not cooking the food or warming the drinks enough. The machine is 19 years old but has had very little use

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  • Panasonic Master
  • 9,098 Answers

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

Posted on Oct 22, 2007

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Posted on Jan 02, 2017

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Hi my oven suddenly started making loud weird noises and now does not heat any food. I smell smoke. What might be wrong?


Seems to me that your magnetron is a goner, check also the antenna shield, cover inside the oven cavity and replace both, you may need to clean and repaint burn surfaces inside oven cavity.

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It probably requires a new magnetron or an invertor board or both. Take it to an authorised Panasonic repair agent for an estimate for repair.

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Panasonic microwave S333 just stopped suddenly. I see on the internet that this has happened to others after about 2 yrs use. Any solution suggestion is appreciated.


Did it show an error code in the display?
If it showed H-98 or similar the magnetron has failed.
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Jan 19, 2011 | Panasonic NN-T694SF Microwave Oven

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Panasonic NN-CT776SBPQ, just 2 y old, burning smell advise what could be the problem and how much it cost\r\n


check if the smell is coming from within the cabin. If so due to non usage of food covers some food particles ccould have got stuck while on heat to the sides of the cavity and results in heating and smoking. If so clean well with a dry clot and wipe out any moisture on the magnetron fitting slot.
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It is actually NN-T695SF, it will not warm food. It powers up then goes dim, then powers up then goes dim, it keeps doing that. Food comes out cold.


Hi, if it is an inverter microwave and the problem is cycling every 2-3 seconds, my experience is the magnetron has most likely gone short circuit and the inverter board is shutting down to protect itself and then restarting, hence your symptom.
DO NOT try to test this unless you are experienced with extra high voltages - the voltages present/stored in a microwave even when powered off can kill you.

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Apr 19, 2010 | Panasonic NN-T694SF Microwave Oven

1 Answer

It shut itself off after 7 min. Microwave....


Sounds like an overheating, probably burnt fuse, maybe due to a bad fuse holder. or for that matter just a blown fuse for a variety of reasons. Will have to check fuse or see where it is losing power

Jun 26, 2017 | Panasonic NN-T694SF Microwave Oven

1 Answer

Faint buzzing sound smoke coming from back


The high-voltage transformer (or inverter transformer) has probably failed.

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

Oct 24, 2007 | Panasonic NN-T655SF Microwave Oven

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