Question about Panasonic NN-S952 Microwave Oven

3 Answers

Panasonic Microwave oven - cooking operation stops afer 2 seconds

Hello,

My Panasonic countertop microwave oven (NN-S952-WF) of about 5 years of age went completely dead when my wife simply opened the door (a couple minutes earlier it had just completed cooking some food for 5 minutes with no problems).

I suspected some blown fuse inside the unit when I proved that it was not the breaker or wall socket or any external problem. After some GOOGLE investigation I confirmed that there is an 18Amp Ceramic fuse inside the unit. So I bought a 20AMP ceramic fuse (and a security torque socket to remove the back screws) and removed the cover and found the blown fuse and replaced it with the 20AMP fuse.

Upon plugging it in, the lights all came on and the keypad / instrumentation all looked normal and even opening the door - the oven light turned on. BUT, when I tried to cook something, the instrumentation showed that the cooking operation was active yet there was no fan noise and no magnetron power hum. After about 2-3 seconds, there was a slight click and the oven turned its cooking operation back off.

I tried it a few times, and the same thing happened.

I suspect there could be some kind of Case Opening Tamper Switch but when GOOGLING, I havent heard anyone mention this.

So does anyone have any idea why my microwave cooking operation has failed? Is this something that is fixable? or is it already time to replace my pretty young oven?

Perry

Posted by on

  • PerryF Jan 16, 2009

    Thanks muchly for the input. Great input. I am assuming it was this short in one of those 4 components was likely the intial reason for the Fuse going in the first place.



    Although I am not that bad at general break/fix, its not one I would take on by myself. My brother is an electrical engineer but I dont like bothering him (I already have been wokring with him to try to fix my Hyperboard on my Toshiba Projection TV).



    Soooo - it seems its time to replace the oven and - well - help our economy with my wee bit of economic stimulas. :(

  • PerryF Jan 16, 2009

    Thanks muchly for the input. Great input. I am assuming it was this short in one of those 4 components was likely the intial reason for the Fuse going in the first place.



    Although I am not that bad at general break/fix, its not one I would take on by myself. My brother is an electrical engineer but I dont like bothering him (I already have been wokring with him to try to fix my Hyperboard on my Toshiba Projection TV).



    Soooo - it seems its time to replace the oven and - well - help our economy with my wee bit of economic stimulas. :(

×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

It is your short switch which is a microswitch located in your door latch assembly

Posted on Aug 03, 2010

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 9 Answers

If you haven't figured out this problem yet, had you considered the door switches. These are the most common part that fail, besides the fuse. The door switches are just to the left of the control board and there is usually 3 to 4 of them. Best to change all 4, as without a proper meter to test them with, just as easy to replace all of them. Definitely search around and check with any local microwave parts stores. Global Microparts is a local company out of Dallas, and they are extremely reasonable on their prices. They will ship anywhere. Hope this helps some. Good luck.

Posted on Jul 30, 2010

  • 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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,214 Answers

Sounds like a short in the microwave circuit. One or more of the following four components has failed -

Transformer
Magnetron
Diode
Capacitor

Repair is not for the amateur, unless you know how to take things apart, and put them back together EXACTLY as the were found.

Parts are available on the Net, and you can get the P/N's off the old components to identify suppliers of the new ones.

Don't try and measure resistance of the diode. It's impedance is far too high to get a good reading. They're cheap anyway. Always replace the capacitor, they're cheap too. No way to test the magnetron, and the transformer is not easy to test either.

Posted on Jan 16, 2009

  • Mark Egan Jan 16, 2009

    It may be cheaper to buy the components and replace them. I bet you can find them on the internet for no more than $200, probably less. I went through this same thing with the In-laws MW a couple of years ago. Just be sure and put the right 18 Amp fuse in, and, reassemble the unit exactly the same way you took it apart. If you have ANY screws leftover, find out where they go. Your dealing with microwave radiation here, which is quite dangerous to the human body.
    And nothing against your brother, but unless he is mechanically competent, they sometimes try to analyze too much, or they are more "electrically" trained, than "electronics", and those trained in electronics and don't have high voltage experience will not quite understand the high impedences of the magnetron circuit.


×

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-T563 shuts off after 5 seconds


We recommend you use the below link to locate an authorized service center. Panasonic microwaves have a 5 year warranty on the microwave.

www.panasonic.com/repair

Apr 12, 2014 | Panasonic NN-S563 Microwave Oven

1 Answer

Panasonic microwave oven nn h965wfx


either your magnatron is bad or hopely it could be your high or low heat sensor

Oct 13, 2013 | Microwave Ovens

1 Answer

PANASONIC NN-S952WF FAN AND CAROSEL STILL CONTINUES WHEN DOOR IS OPENED. NOT SURE IF THE MICROWAVE CONTINUING AS WELL WHEN DOOR IS OPEN.


The door interlock system has beem compromised , meaning it shifted out of position or the interlock has broken. Dont continue using it like that it will eventually blow the fuse.

May 13, 2009 | Panasonic NN-S952 Microwave Oven

1 Answer

PANASONIC MICROWAVE-NN-S615BFX


These H codes usually indicate a problem with your inverter, magnetron, or digital programming circuit.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

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.

Sep 25, 2008 | Panasonic NN-MX26 Microwave Oven

1 Answer

Operates for 3 seconds on microwave then stops


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 could possibly be as simple as a loose connection in that area. The repair shop your friend used may not have been Panasonic-authorized.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer.

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

Sep 15, 2008 | Panasonic NN-C980 Convection/Microwave...

1 Answer

Runs for three seconds then shuts down. Model NN-S952


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.

In most cases, this is a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer.

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

Jul 28, 2008 | Panasonic Microwave Ovens

1 Answer

Panasonic NN- A712 combination Microwave 1000w - Switches off after 20 seconds


The 22 seconds is the giveaway.

In most cases, this is a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer.

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

Jul 14, 2008 | Panasonic NN-S753 Microwave Oven

1 Answer

Panasonic NN-T994SF 1250 watt countertop microwave stopping


From my research, this sounds like a fairly new model. Consult your user's manual to see if this is a user, or common issue. If nothing is descibed then I would seek possible warranty service, or dealer replacement

Jun 03, 2008 | Panasonic NN-T994SF Microwave Oven

Not finding what you are looking for?
Panasonic NN-S952 Microwave Oven Logo

577 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

8862 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Devabhakthuni...
Devabhakthuni...

Level 2 Expert

224 Answers

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

Answer questions

Manuals & User Guides

Loading...