Question about Panasonic NN-S251 Microwave Oven

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My microwave died

It is actually a Panasonic NN-S254BF.  That wasn't one of the options .  It is a 3 year old unit that we bought because of the reliability we had with Panasonic products.  One day while cooking for a short period of time it lost all power.  I tried plugging it into another electical socket and no power at all, no lights on display and no noise.  What could it be? Also, for the trouble and expense of taking it off the wall and having it serviced, am I better off getting a new unit?  I have seen the same model for as low as $140.  I doubt I would buy the same unit since it only lasted 3 years.  We had a Sharp which lasted >10 years.  What are some reliable brands if I don't get this fixed?

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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

Posted on Oct 22, 2007

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If it's permanently dead, it's probably the main fuse. If it blew while cooking, then the fuse holder may not be holding the fuse tightly enough, causing the fuse to heat and blow. You could also have some component failing in the high voltage section (transformer, rectifier, capacitor, magnetron). Thermal protectors sometimes fail as well.

Posted on May 04, 2016

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1 Answer

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?


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.


Jun 06, 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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there is a switch to turn it on or off. the turntable is replaceable

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follow the incoming mains lead into the microwave their is a small pcb with a fuse their check this first

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the child lock feature is activated.

if you can look at your manual, it would be stated there how to activate and deactivate your child lock option.

tnx 4 using fixya

drcool

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1 Answer

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

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Panasonic NN-S254B How fried is it?


There is an internal fuse, so check that first. If the fuse checks ok, definitely buy a new microwave - losing a neutral usually damages the main circuit board. Given the cost of the board and the distance involved, it just wouldn't pay to chase the parts down

Jun 18, 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

Install panasonic over the range microwave


I would see Panasonic's FAQ or contact them. For FAQs, see http://service.us.panasonic.com/faq/faq.aspx

For support see http://www2.panasonic.com/consumer-electronics/support/Home-Appliances/Microwave-Ovens.75543

All in all, I would think that if you anchors are secure and the wood is at least 1/4", it should be fine. But I would contact Panasonic.

Your owner's manual may tell you more. To download your Panasonic owner's manual see http://service.us.panasonic.com/operman

We're happy to help and we appreciate your thoughtful rating of our answer.

Nov 29, 2007 | Panasonic NN-S254BF Microwave Oven

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