Question about Panasonic NN-P295SF Microwave Oven

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

Over the range microwave oven, all of a sudden blows 250v 18amp bussfuse when trying to cook. replace fuse, display panel lights up, lights and blower fan work, but when try to cook, blows fuse again. No visible signs of damage to control panel or board. Unsure of next move, could safety switch be possible cause of problem? Any help would be appreciated. Cannot find anything on line to help me with this problem.

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  • Panasonic Master
  • 9,098 Answers

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

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Posted on Jan 02, 2017

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The Mocrowave Panasonic NN P295 stopped working. Not a single light is on. I checked the power at the receptacle - is OK. May be the fuse inside the microwave was blown. How can I replace the fuse. Where...


Did you recently have trouble with the cooktop lights?

Sometimes when the cooktop lights blow or are inserted or removed while the oven is still plugged in, the filaments can short, causing a surge that damages the controller.

They can be repaired. More details here.

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Where is the thermal switch located


If your model is NN-P295, then the service manual is here.

You can order Panasonic parts from
Encompass here.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Most microwaves have a thermal cutout or thermostat on the magnetron, on the top of the cooking cavity, and often on the floor of the oven or above the bottom cover.

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

Jul 13, 2011 | Panasonic NN-P295SF Microwave Oven

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My microwave just stopped working. No problems until now. In the middle of cooking it just stopped. No display, no beeps, no bouttons working, no light inside. There is power to the outlet I can plug in...


for the microwave to stop suddenly it has blown its internal fuse this is located under the top panel of the unit it should be white with two silver tips ( ceramic fuse) in some cases the fuse will blow for no good reason on the other hand it can be a serious fault the fastest way to check this is to replace the fuse and re test the unit if the fuse blows instantly then bin the microwave if not it the fuse may have simply failed


best of luck always remember unplug the unit first and always replace with same size and and current fuse

please rank this advice if it helped you

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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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