Question about Microwave Ovens

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Panasonic nn-t9455sfx has no power

Hit start button and all the power (including interior light) went out. app 1 yr old

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  • Microwave Ovens Master
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If total dead look for the fuse inside and make sure the circuit it is plugged into is active(has power).

Posted on Dec 12, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: 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

Posted on May 22, 2008

Illeagle
  • 525 Answers

SOURCE: Panasonic microwave start button

You may have a sticky door switch. Try a simple "slamming" of the door, don't over do it, just a little harder than normal. This may help pop the plunger in the switch back up. The switch could have also become loose and moved out of its adjustment.
If this does not help, a technician should save you time and money with this sometimes perplexing problem.

Posted on May 24, 2008

  • 1 Answer

SOURCE: Panasonic NN-H264 1200...stops after 3 seconds

I found sufficient information elsewhere.

Posted on Feb 13, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: panasonic nn-s255 wont turn on

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.

It 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.

NOTE: The FixYa system is not currently notifying me when folks reply to my posts, so please contact me directly for more help.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Sep 12, 2009

  • 1 Answer

SOURCE: Door Release Button not working on Panasonic Microwave NN-T664SFT

The problem I had experienced with the Door not opening easily will be resolved by removing the micowave oven top cover with a tamper proof torx head, replacing the door switch and reinstalling the top cover.

Posted on Jan 20, 2010

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1 Answer

Whaqt are the dmensions of panasonic genius premier model number nn-s7768a


Here's your answer and then some, in case it helps

Brand: Panasonic
Name: The Genius Premier 1000W
Primary feature: reheating of popular food categories is done automatically (time and power level automatically determined, often time adjusted based on steam sensor). Defrosting also done by entering weight (so time is automatically determined).
Color: black matte top/lateral sides; black gloss front; white back; silver bottom
Style: Counter/table top (label says not for mounting)
Model: NN-S7768A
Manufacture Month/Year: September/1996

Dimensions Exterior: 14"T x 23-3/8"W x 16-1/2D (18 including protruding door handle and back cord plastic clip)
Dimensions Interior: 10-5/8"T x 16-1/4"W x 15-1/4"D
Cubic Feet interior: ~18.28 cu ft (based on three interior dimensions multiplied together and divided by 144 to get from cubic inches to cubic feet)

Note:
I found a manual from a similar model; you'll probably want to pring page 15 as a reference, since each food category button has 2-4 modes based on the type/temperature of the food, e.g. veggies are 1. for potatoes up to a certain quantity and weight each, 2. fresh veggetables of a certain weight, and 3. frozen vegetables of a certain weight. Specific instructions on adding water, covering, etc. are also included. Makes microwaving pretty easy!
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CGAQFjAB&url=http%3A%2F%2Fservice.us.panasonic.com%2FOPERMANPDF%2FNNS696.pdf&ei=BMEnU4-RLaWbygHQ2oCQCg&usg=AFQjCNF2JlFATy7HV-Ltv0BjDUf_LHHi3g&bvm=bv.62922401,d.aWc

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1 Answer

The turntable keeps rotating when the door is opened - Panasonic NN-T994SF


You probably have a shorted main relay on your control board, which I can repair. Details here.

FixYa doesn't notify me when there's a response, so if you have other questions, please contact me directly.

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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1 Answer

Panasonic microwave NN-S666BA


No! the main fuse is okay because you would not have any power. I would check all door switches because they control light, fan, and turntable. If you are handy with a meter, set to ohms, disconnect one wire on side of switch, use meter to test, readings should show open/short when pressing the button and releasing it, replace wire to switch and repeat, if you hit one with the same readings pressed in or out, change the switch.

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1 Answer

My NN-T994SFR Panasonic Microwave shuts off after 1 second.


My unit shuts off after about 2 seconds. It seems like it tries to go, but it sounds like it stops working and then 1 or 2 more seconds run off and it shuts down. Then you hit start again and it lights up inside and then shuts down. It's only about 2 or 3 years old.Any solutions?

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something burned out, has there been a thunderstorm lately?
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