Question about Panasonic NN-P295SF Microwave Oven

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I have a panasonic nn-s255wfx microwaive I believe has blown a fuse. I went to use it and right after I turned it on all power died on it and I heard a buzzing/click behind the control panel. It now has no power at all but the circuit breaker did not trip and the power outlet is fine. I'm trying to find the fuse and panasonic said it is not user servicable so they wont tell me where it is. Can you tell me the exact location and what it looks like?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Illeagle
  • 525 Answers

SOURCE: Microwave causes GFCI on another circuit to trip

You may have a shorted High voltage component. Possibly a recttifier,aka, diode. This should only be replaced by an experienced repairman as an extremely high voltage shock potential exists.

Posted on May 27, 2008

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MicrowaveSvc
  • 9047 Answers

SOURCE: no power to the unit, fuse tested fine, outlet is working

Sorry, but your subject line got cut off.

Assuming the outlet is fine, it may be a thermal cutout / thermostat on the magnetron or on top of the cavity.

The best place to order parts for this brand is Encompass (formerly 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 Jan 02, 2009

nuwan chinth
  • 111 Answers

SOURCE: Stop working

IS IT POWER UP.
please rmoove the cover and check the fuse also.
is it work?????
nuwan

Posted on Jan 12, 2009

JSEhandyman
  • 368 Answers

SOURCE: Tripping circuit

Hi lbeaujuin,

You don't say how long this has been going on; I'm going to presume it's a recent development.

Several possible scenarios come to mind. I'd first look around and see if any other appliances have been connected to that circuit. In my area (Minnesota), the electrical code requires that microwaves have their own dedicated circuit and breaker; if this is not the case, you need to see what else is competing with your microwave for that breaker's power supply.

One other possible cheap fix - in case the breaker is defective, try swapping out the breaker in-question for another of the same rating (DO NOT, repeat, DO NOT put in a bigger/higher-rated breaker without having a qualified electrician OK it). If this isn't the problem, it never hurts to have a spare circuit breaker on-hand. Might even be able to switch around with another of the same rating, just understand that you'll lose power to both circuits for the duration of the test.

If it's on it's own dedicated circuit, then it's likely the oven itself with an internal short of some kind. Because I don't know your level of skill in dealing with 110V AC electricity, my recommendation is that you have someone qualified open it up and start checking short-circuits with a multi-meter, observing all safety precautions.

If you've isolated the problem to being the oven, and it's going to cost more to troubleshoot than replace, you might be able to cut a deal by trading-in your old oven against the new one - - if the shop you buy from has quailfied repair people on-staff, they might be able to refurb and re-sell it used.

If I can be of further assistance, or if you have questions about any of my response(s), please let me know before rating me.

If this solves the issue, please rate it accordingly. My goal is to earn a "FixYa" rating from everyone I help.

Thanks for using Fixya.com,

Jon

Posted on Feb 21, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: panasonic nn-s255 wont turn on

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://www.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/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.

It 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.

NOTE: The FixYa system is not currently notifying me when folks reply to my posts, so please contact me directly for more help.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Sep 12, 2009

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Panasonic nn-s255 wont turn on


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://www.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/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.

It 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.

NOTE: The FixYa system is not currently notifying me when folks reply to my posts, so please contact me directly for more help.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

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good day,
hope this link below will solve your problem.

kitchen appliances

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Just cleaning is not enought.The terminal is loose and that isusually the problem most of the time.Replace them with new ones and I think you be happy.

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Runs for 3 seconds


check inverter transter or Magnetron short to be repalce

G.K.MAHENDRAN.
Date: 09.05.2008

May 07, 2008 | Panasonic NN-S540 Microwave Oven

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