Question about Panasonic NN-T990SA Microwave Oven

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Panasonic 1300 watt NN-S654BF microwave stopped cooking. No matter how much time is entered, after cook is pressed, the microwave runs for 23 seconds and the display returns to the clock as if it had run through the entire cycle. The fan and the carousel run, but the extra power draw of cooking is not heard nor is the food warmed.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 4 Answers

SOURCE: my microwave says "child" and won't play anymore

Not sure of the TT series models but for the NN series models the procedure is as follows:-

If "Child" is displayed in the display window, then the child safety lock is on.

To remove the child safey lock, press the "Stop/Reset" button 3 times in fairly short succession (less than 3 seconds). The time of day or just the Colon sign (:) is then displayed

If you later want to apply the Child safety lock, then, when the time of day (or colon sign) is displayed, press "Start" 3 times (again in short succession).

Hope this helps

Doug

Posted on Nov 08, 2008

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MicrowaveSvc
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SOURCE: Panasonic nn-p295 blows buss fuse when turned on for cooking

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer. But this is likely an inverter model, so it wouldn't have one and would be some other component in the inverter I'd say.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

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

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

http://www.microwavedisplay.com/doorsw.txt

http://www.gallawa.com/microtech/cap_test.html

http://www.gallawa.com/microtech/xformer.html

http://www.gallawa.com/microtech/mag_test.html

The best place to order Sharp parts is Tritronics. Or you can call them toll-free at 866-779-5835.

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

Posted on Dec 26, 2008

  • 1 Answer

SOURCE: Panasonic NN-S262SF stops cooking after 3 seconds

inverter problem the transistor 1M30D is shorted

Posted on Jan 07, 2009

garing
  • 998 Answers

SOURCE: Panasonic Microwave turns on and tray rotates when door is opened

check the door switches

Posted on Aug 16, 2009

fathitkf
  • 1871 Answers

SOURCE: 1200 watt panasonic, power on but will not perform

Hello :

This happens because of a bad door switch . The plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door .

best regards .

please don't forget to rate !

Posted on Apr 04, 2010

Testimonial: "Thnaks; If this is my problem, how is this switch replaced, is it a proffesional job , or simple? Thank you kind sir.T.K. tkeytanner@gmail.com"

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Discussion on the appearance, aesthetics, form and colur


Hello dutch.

This is an excellent microwave, over the range, white only. Here is a link to all of the features, and even the owner manual http://www2.panasonic.com/consumer-electronics/support/Home-Appliances/Microwave-Ovens/Over-the-Range-Microwaves/Technical-Specification/model.NN-S254WF.T#ts
Microwave Type: Over-the-Range Cooking Power: 1200 Watts Capacity: 2 cu. ft. Convection Cook: Without Convection Cook Dimensions Exterior Depth: 15 in. Exterior Height: 9.5 in. Exterior Width: 23.25 in. Miscellaneous Product ID: 22541798 More Information Details: Over the Range Microwave with Panasonic Inverter Technology provides true multiple power levels. When the user asks for 60% power, the oven delivers a true 60% power, not a pulsed delivery of 100% power 60% of the time. This method is called linear power delivery

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1200 watt panasonic, power on but will not perform


Hello :

This happens because of a bad door switch . The plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door .

best regards .

please don't forget to rate !

Apr 04, 2010 | Panasonic NN-S262SF Microwave Oven

1 Answer

Micro Wave shuts down


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, 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.

Nov 19, 2008 | Panasonic NN-S443WF / NN-S443BF 1200 Watts...

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Panasonic NN-S262SF stops cooking after 3 seconds


inverter problem the transistor 1M30D is shorted

May 28, 2008 | Panasonic NN-S262SF Microwave Oven

2 Answers

MW stops after 23 seconds.


PLESE CHECK RELAYS ON PCBOARD .ALSO TRY DISCONNECTING ALL CONNECTIONS TO FRONT PANEL LEAVE IT DISCONNECTED 5MIN THEN RECONNECT AND TRY THE ELECTRONICS SHOULD RESET .HOPE I HELPED BIT OF A WEIRD FAULT

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