Question about Panasonic NN-S254BF Microwave Oven

2 Answers

My NN-S254 Microwave comes on intermittently, mostly dead

My NN-S254 Microwave went completely dead shortly after I replaced the grease filters and added a charcoal filter. While I was wondering what to do next, it came back on and worked for a few hours. It has been doing that now for a couple of weeks. I have noticed that it comes on AFTER we have done some heavy cooking using all the coils on the cooking range below.
Sometime back, I noticed a light brown grease like substance leaking inside the oven, but else it was working very well.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 4,088 Answers

Try cleaning (pull the power cord plug first) the inner side of the sheet metal waveguide which may have a layer of grease that could short out the microwaves. This waveguide runs from the magnetron base over to the cooking cavity and usually can be removed by undoing some sheet metal screws along it's length. There is a fan-like device called a 'stirrer' that is located near the cavity opening under the wave guide and it should be cleaned also along with the cavity entry window. Hope this helps!

Posted on Nov 12, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Prodigy:

    An expert who has answered 500 questions.

  • Expert
  • 547 Answers

Sounds like there might be a loose connection somewhere. Both heat and cold cause different metals to expand and contract differently. This could be causing the intermittent problem you're describing. I'd look to see if you may have disturbed some of the wiring when you changed filters. Some ovens (mainly commercial units) have switches that sense when the outside cover is off, or loose. Unlikely to be the problem, but worth looking into.

Posted on May 04, 2016

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

NN 8501V Panasonic Dimension 4 Convection/Microwave oven keeps blowing fuse


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

If it went dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

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 it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

Apr 16, 2013 | Microwave Ovens

1 Answer

NN-T964SF 1250 Watts Microwave Oven: my microwave went dead and wouldn't turn on at all...


Sounds like a blown fuse. Carefully remove the cover, and the fuse in directly behind the power cord on the top. Radioshack sells 15A ceramic replacements.

May 17, 2010 | Panasonic NN-T964SF Microwave Oven

1 Answer

Main fuse blows when I press start on panasonic nn-255 microwave opened up microwave and see 25 ohms on cn702 of invertor circuit board, what's normal? This would appear to be a short to the 120v supply,...


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

You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.

Apr 17, 2010 | Panasonic NN-S255 Microwave Oven

2 Answers

Microwave stopped working while cooking. Is there a fuse?


If unit is built-in reove screws holding unit to cabinet.
Slide out about 2 inches to access 3 screws holding grill.
Remove grill to get to two screws holding control panel.
Fuse is behind control panel,

Jan 16, 2009 | Panasonic NN-H264 Microwave Oven

1 Answer

My Panasonic NN-T785SF Keeps blowing the Fuse?


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.

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

The best place to order parts is Tritronics. You can also call them at 866-779-5835.

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

Nov 25, 2008 | Panasonic NN-T774SF Microwave Oven

1 Answer

I have a panasonic range microwave oven model NN-H264/S254 clock cannot be set. (It use to work but no longer can be set)


Sounds like you disabled the clock function. If you do not have the user manual, you can get a copy at this website and use the function keys to reactivate and set the clock...

http://safemanuals.com/user-guide-instructions-owner-manual/PANASONIC/NN-H264-_E

I belive the information you seek is on page 12 of the manual.
Hope that helps...

Aug 13, 2008 | Panasonic Microwave Ovens

2 Answers

Panasonic Dimension 4 microwave model NN-C703BBPQ not working. Display is not illuminated as if fuse has blown. Have changed fuse in plug, but still no visible sign of life. Anything obvious that might...


A microwave can be dead for many reasons.

It may be the fuse, which is usually located on the floor of the oven behind the control panel or between the door switches.

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

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

Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

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 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 it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

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

Jul 29, 2008 | Panasonic Microwave Ovens

1 Answer

Panasonic NN-P294SF dead


Yes, there will be a fuse and also on or above the magnetron, there will be a thermal cutout or thermostat, and one on the top of the cavity.

But here is our long answer on a dead microwave:

A microwave can be dead for many reasons.

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

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open. Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

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 it goes dead or blows the breaker 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 it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

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: http://tinyurl.com/yzjozk

Please feel free to contact me directly if you need more help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

May 19, 2008 | Panasonic NN-P294SF Microwave Oven

1 Answer

Microwave completely dead


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 magnetron thermostat to open. Then when it cools, it closes the circuit and allows power through again.

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

If you or a friend 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: http://tinyurl.com/yzjozk

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

Dec 04, 2007 | Maytag MMV5165 Stainless Steel 1000 Watts...

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

Not finding what you are looking for?
Panasonic NN-S254BF Microwave Oven Logo

323 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9047 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1667 Answers

SHARCNET-USA
SHARCNET-USA

Level 3 Expert

2130 Answers

Are you a Panasonic Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...