Question about Panasonic NNSD297SR 1200 Watts Microwave Oven

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I have an NN-SD277s Over the Range Microwave newly installed. The clock and timer work, but when I program the unit to cook for 1 minute (or any amount of time) and press start, the display counts down 2 seconds, nothing ever "powers up" and the display goes blank. The exhaust fan and overhead light no dot work either.

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6ya6ya
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Posted on Jan 02, 2017

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fridgetech
  • 473 Answers

SOURCE: Panasonic NN-2501 Microwave Oven range hood

It is possible that the magnatron is bad but hard to say on a no heat problem without checking all components. A lot of model give 5-7 yr warranty on that part.

Posted on Oct 05, 2007

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MicrowaveSvc
  • 9098 Answers

SOURCE: I have the Panasonic "The

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

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door 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.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

If you or someone you know 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:.

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 this case, it's probably happening because it;'s not cooking due to a switch problem.

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

Posted on Aug 18, 2008

hsanfor
  • 71 Answers

SOURCE: microwave wont start but timer counts 3 secs and shuts off

Check the door latch mechanism the black nylon door catch may be broken.

Posted on Jun 19, 2009

heatman101
  • 43501 Answers

SOURCE: panasonic nn-sd277s over the range microwave.

Hi,


Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

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Posted on Jan 03, 2011

  • 1 Answer

SOURCE: NN-SD6968 set the timer, press

I just developed this problem with my panasonic inverter microwave...does anybody know about this problem?

Posted on Jun 28, 2011

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1 Answer

How to set the clock Model NN-SA651S


To set the clock, press Timer/Clock twice when the microwave is not in use. The colon between the hour and minutes should start to blink. Type the current time (12-hour clock) with the appropriate number key pads. To save the time and exit the clock set mode, press Timer/Clock once more. Note: if you take too long to begin typing the time, the microwave may exit the time set mode. In that case, the colon will stop blinking. None of the other features of the microwave will work when the colon is blinking.

This is shown on page 11 of the manual which is available on the Panasonic NN-SA651S support page: http://shop.panasonic.com/support-only/NN-SA651S.html . The direct link to the manual is currently ftp://ftp.panasonic.com/microwaveoven/om/nn-sa631_nn-sa651_nn-sa661_en_om.pdf .

I hope this helps.

Cindy Wells

Mar 16, 2018 | Microwave Ovens

1 Answer

NN-T774 INVERTER STOPPED WORKING AFTER 4 WEEKS


Check to make sure one of the plastic hooks on the door was not broken off. If both door hook latches are functional then the most likely cause of your problem is one of the latch switches located behind the control panel. These switches will fail if the oven user opens the door frequently BEFORE the cook cycle ends. Always push STOP/RESET before opening any microwave oven door.

Dec 30, 2009 | Panasonic Microwave Ovens

2 Answers

No Heat but everything else works


Magnetron and diode most likely. Need more info.

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Panasonic Genius Sensor 1300W


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.

That 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.

Aug 30, 2009 | Panasonic NN-SN657SMicrowave Oven

2 Answers

Tappan TMV151FS over range microwave starts to work and then dies


Never run the microwave without a load (something to heat)!!! That kills the microwave generating parts.

Sounds like a 'thermal' protect switch is activating after running. Make sure that (if the unit is mounted in a cabinet) that there is sufficient space around the unit for proper air flow and that nothing is blocking the vents. Try setting it on a counter top and heat something. If it works properly and doesn't shut off, the venting space is the problem. You may have to have the cabinet that it sits in redesigned for more clearance.

Aug 19, 2009 | Tappan TMT104E1 Microwave Oven

1 Answer

Microwave wont start but timer counts 3 secs and shuts off


Check the door latch mechanism the black nylon door catch may be broken.

Jun 19, 2009 | Panasonic NN-T993SF Microwave Oven

1 Answer

JVM1190 wont cook


You have a blown actuator. This is the device that creates the microwaves that cook the food. The cost of one of these will be as much as a new unit.

Nov 09, 2008 | GE JVM1190 Microwave Oven

7 Answers

Microwave oven (nn-sd997s) stuck in DEMO mode


Pressing "timer/clock" button 4 times turns on and off demo mode.

Apr 26, 2008 | Microwave Ovens

2 Answers

Panasonic NN-2501 Microwave Oven range hood


It is possible that the magnatron is bad but hard to say on a no heat problem without checking all components. A lot of model give 5-7 yr warranty on that part.

Oct 05, 2007 | Panasonic NN-S251 Microwave Oven

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