Question about Panasonic NN-S961 Microwave Oven

1 Answer

Microwave on its way out?

Bought the MW in Early 2002. About 3 weeks ago it started doing the following: Turntable and fan would begin running whenever the door was open. It was apparently not radiating as I checked it with a small bowl of water.

Last night I was cooking some MW popcorn and 3 seconds into its cycle it just stops operating. Interior light still on, MV timer still decrementing, no fan, no turntable motion. After 3 seconds of this, the MV timer blanks ans it goes back into normal mode as if I had never set its timer.

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  • bsirvine Feb 26, 2008

    Thank you very much for the solution to the door problem. Did you get a chance to look at the second paragraph?

    "Last night I was cooking some MW popcorn and 3 seconds into its cycle
    it just stops operating. Interior light still on, MV timer still
    decrementing, no fan, no turntable motion. After 3 seconds of this, the
    MW timer blanks ans it goes back into normal mode as if I had never set
    its timer."

    Now it has gotten to the point where if I stick around and reset and restart 1one out of 3 times it will continue through its cycle perfectly as if nothing is wrong. On 2 out of 3 times it will audibly "pause" (or hiccup) after about 3 seconds. Then half the time it will quit and blank the timer; the other half of the time it will hiccup again after 3 seconds and then continue as if nothing was wrong. Any ideas about this?



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  • 9,098 Answers

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

Switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:

You can find helpful exploded view diagrams and order parts by entering your full model number here:

If you think the problem is on the control panel, which we repair these nationwide for $39.95 postpaid.

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

Posted on Feb 25, 2008

  • William Miller
    William Miller Feb 27, 2008

    I would take it one step at a time and check and replace the switches as needed.

    And as my door switch info mentions, you should check the door switch mounts, too.

    Once you've done that, let's see if things change, and if so, how.



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This is a classic door switch problem. I fixed a friend's MW a few months ago that had this exact symptom. Got a family member's MW going again last summer for similar (not identical) problem.

In our case, one of the switches was broken (shorted). There are usually a group of similar door switches all mechanically ganged together behind the latch. If the MW has a wiring diagram, you can use it to figure out which switch controls the light, fan and turntable. Check the switch with ohm-meter after you get it out. The switch plunger may have lost it's springiness.

You need to be clever mechanically to figure out how to disassemble for the R&R (remove&replace). Don't break plastic mounting pin or you may have to improvise repair for that too!. It may help to have the service manual for your particular model (worth a google search). The switch is probably relatively inexpensive ($5 or so) and a generic replacement should work fine if it has the same-or-higher voltage and current rating.

Apr 22, 2016 | Microwave Ovens

1 Answer


check every step and fix it God bless youOK, get ready, this micrwave oven repair can take some time. This is where you must be able to read a wiring diagram and do some "live" checks on parts. First easy check is to make sure power is coming off your control board at the MW relay. Make sure of the wires and test here, if you have 120 volts at this point, you have ruled out a lot of parts that could be the problem. You have now ruled out any switch problems, control board problems, or a thermostat or 2.
If you do not have power from that MW relay on the control board, you must trace the wiring back to see if the proper voltage is going through your switches, any thermostats, and arriving at your control board. Your wiring diagram on your sheet will show you where and what to test. Below is a general switch test troubleshooting guide.


mwswitchtest2.jpgIf the proper voltage is coming into your control board and you are not getting voltage at the MW relay, then you need to replace the control board. If voltage is interupted by a thermostat or switch from your testing to the control board, then replace that part.
Now, testing from the MW relay on to your transformer, high voltage capacitor, magnetron, and diode.Do not do any voltage reading from the secondary side of the transformer on, this can be a deadly microwave oven repair if you do not follow directions. This can result in electrocution and the "blowing-up" of your voltmeter, only do OHM testing with the power off and the capacitor discharged. Someplace in this circuit, usually before the transformer, you will have another thermostat to test. It is usually mounted on the magnetron. Do a quick OHM test to see if it is open or closed.
Now to test either the transformer, high voltage capicitor, magnetron, and diode, you must test each part separately. A good rule of thumb, if your capacitor is bad, change the diode also. Another note, if you are working on an OTR model and you have determined to be one of these "heating" circuit parts, you can not test these parts until you take the unit down. If you don't have the parts with you and you have to order them, order the magnetron, capacitor and diode and you will have a 90% chance of solving the problem. If it is an older microwave, order the thermostat also, most times you can return un-used, un-opened parts. Check with your parts supplier. This way you only have to take the unit down once.
To test these parts, scroll down this page and you will see a chart with component tests. Follow the instructions to find which part(s) are defective in your microwave oven repair.
Microwave Runs, Heats, but turntable does not move This is a fairly easy one. First, make sure the turntable coupler under the glass dish is not broken. Second, on the control board, find the turntable relay and test for voltage. Some turntable motors are 24 volts DC, so make sure your testing the correct voltage. If no voltage from the control board, then replace the control board. Otherwise head towards the turntable motor.
On OTR models, you can get to the motor by un-screwing the bottom panel on the microwave. On countertop models, there will either be a knockout or screw on access panel. Check for voltage at the motor. If no voltage, check the wiring back towards the control. If voltage, then replace the turntable motor. The component list below also shows how to test a turntable motor.

Apr 02, 2013 | GE Microwave Ovens

1 Answer

MCD1611W New, popping popcorn in glass MW corn popper. 3-4 minutes to pop. After popped I open the door and after a few seconds the MW shuts down completely, no lights, no response to pad pushing.

Popcorn is a low-moisture food which can cause a microwave to overheat, as can a failure of the cooling fan or blocked vents.

You should always turn a paper plate upside-down on the turntable (slightly off-center for better heating) and place the popcorn container on top of that.

The paper plate elevates the popcorn for better exposure to the energy and protects the turntable from excessive heat.

Placing food off-center instead of in the center increases exposure to the energy and prevents the same spot on the turntable from being overheated repeatedly, which leads to material fatigue and cracking.

It's also a good idea to put about 1/2 cup of water in a 1-cup microwave-safe container in the corner of the oven when cooking low-moisture foods like popcorn, bacon, and potatoes.

The microwave's magnetron has a thermal protector (thermostat, TCO, or thermal fuse) attached to it.

If the magnetron gets too hot, it can be damaged or destroyed, so the thermal protector opens and disconnects the power to the whole oven.

If it is a resettable device, the power will be restored when the device cools. If it is not resettable, the device must be replaced.

FixYa does not directly notify us experts of responses, so if you have other questions, please contact me directly.

- William E. Miller, AS-EET
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

May 28, 2017 | Magic Chef MCD1611W

2 Answers

Our Viking VMOS200 just stopped working. The lights and the countdown timer work, but no fan noise and no turntable spin.

it has nothing to do with the magnetron. first you have to fix step one. then you will know if the magnetron is bad. its one or two of the primary switches on the bottom of the switch tower. usually with these mw if you dont press cancel to stop the mw, and you just push the latch to stop it, those wires heat up and cause the microswitches to burn and loose proper contacts.

put a cup of water in the mw. set it to one minute and as its counting down. push on the latch LIGHTLY, as to not fully open the door and you will hear the magnetron kick on and the turn table start to rotate

Mar 06, 2011 | Viking VMOS200 Microwave Oven

1 Answer

Microwave not working (generating heat)

Please check the door switch for proper operation.

May 19, 2010 | Frigidaire PLMV168 Microwave Oven

1 Answer

Fan & Turntable start when door is opened.

sounds like there is a switch that is bad. you can go buy a new MW for about 200$ and in yours if there is a major problem then i would just go buy a new one but might be worth a repair man to come check it out

pleas do not poke around in the microwave as it carries a charge of 5000volts and can kill you even if not plugged in DON'T TOUCH THE WIRES WITH BRAIDS ON THE OUT SIDE if you must get inside of the unit

Dec 10, 2008 | Microwave Ovens

1 Answer

Find glass turntable replacement part

These are the glass trays listed to match the models you gave (NR961T is actually MR961T) and they are all shown as no longer available from standard suppliers:

MW-7600-04 MW-7600-06 MW-7600-11 MW-7600-13. MW-7600-12 should also work.

You can order one of the -11 or -12 trays by part number here.

It may take a week or two, and they may reply back that they were unable to find one, in which case they will not charge you.

If you can't find one, you can check eBay or Wal-Mart and other stores to see if they have a Rubbermaid or Nordic Ware (NordicWare) wind-up turntable like this "Micro-Go-Round". (I've seen them at Wal-Mart).

In some cases, two microwave-safe plates can serve as a makeshift replacement for a missing tray. You have to find a saucer that fits securely on your turntable support, though. Here;'s a photo of that, too.
We're happy to help you and we'd appreciate your thoughtful rating of our answer.


Jul 17, 2008 | Welbilt MR755T Microwave Oven

1 Answer

Fan runs when door is closed - no heat

This is normally 1 of the interlock door micro-switches not working.

Jun 20, 2007 | Sharp R-1490 Microwave Oven

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