Question about Panasonic NN-S254BF Microwave Oven

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Microwave (Panasonic NN-S254BF) starts, runs 2-3 seconds, and then shuts off. I have checked the door latch switches, and they are all working like they are supposed to. Whats wrong?

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  • Panasonic Master
  • 12,061 Answers

In all likelihood the mangnetron has failed, or perhaps even the Power Supply. or a fault that is shutting the system down for safety reasons You need to have it serviced by a reputable service centre/man. Ensure you get a firm "Quote" before proceeding, and remember these days the cost of repair can equal or exceed the price of a new one.


Posted on Jun 06, 2010

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Why does NN-SN651x Microwave sometimes starts, sometimes not ?


Adj door latch switch assembly. It is not aligned properly preventing the door hooks to engage.

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We regret reading about your microwave. At this time we recommend you have the unit evaluated by an authorized service center.

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Sharp carousel convection/grill/microwave maybe R990


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 .

Check also the turntable . It could be out of it's right place .

WARNING :

1:Don't slam your microwave door because this may cause the fuse to blow and this is the reason of bad door switch problem .
2: A microwave is capable of giving you a serious electrical shock even when it's unplugged , so I recommend you to call a repair technician for help .

please don't forget to rate .

good luck .

Jun 03, 2010 | Panasonic NN-S254BF Microwave Oven

1 Answer

Panasonic NN-S254BF microwave oven runs for 2-3 seconds and then shuts off'


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://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 NN-S254BF Microwave Oven

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Microwave wont start but timer counts 3 secs and shuts off


Check the door latch mechanism the black nylon door catch may be broken.

Jun 19, 2009 | Panasonic NN-T993SF Microwave Oven

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Stops after 3 seconds - Panasonic NN-S252BF


may be magnetron spoiled or high voltage section problem,please check circuit andreplace damage parts...

Aug 14, 2008 | Panasonic NN-S254BF Microwave Oven

1 Answer

Sharp mdl R-1870 convection microwave runs for 1 min


This is a problem in one of the damper-related components, most likely the switch, but it may also be the motor or the damper door.

The damper is a door inside that opens or closes depending on cooking mode. If the controller senses that the door is not in the right position, it will shut down the cook cycle.

Sharp models stop after 59 seconds.

See the attached sample photo.

We have the service manual and have uploaded it to our site:
http://www.microwavedisplay.com/r1870_r1871_sm.pdf

You can order Sharp parts from Tritronics at http://www.wehaveparts.com

529d312.jpg

Jun 07, 2008 | Panasonic NN-S254BF Microwave Oven

1 Answer

Panasonic NN S254BF


It sounds like one of the wires or serkits are loos so the electrisity is not getting to it all the way I would return it or take it apart and try to fix it your self.

Dec 29, 2007 | Panasonic NN-S254BF Microwave Oven

1 Answer

MICROWAVE TURNS ON WHEN DOOR IS OPENED.


This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

Door switches are most often damaged by opening the door while it's cooking (instead of pressing Stop / Clear first) or food
/ grease debris in the switch.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Nov 05, 2007 | Panasonic NN-S254BF Microwave Oven

1 Answer

Panasonic microwave s254bf stopped working


A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to

open. When it cools, it closes the circuit and allows power through again.

If it's random, it may be a bad connection, usually on the control board or fuse holder.

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.

If the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

At our site, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information.

See our listing here on FixYa: http://tinyurl.com/yzjozk

Oct 21, 2007 | Panasonic NN-S254BF Microwave Oven

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