Question about Microwave Ovens

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My panasonic will run for about six seconds and stops, and smells like burning wires and it shows a message "SENSOR RE-HEAT PRESS START"

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  • Microwave Ovens Master
  • 9,047 Answers

If it stops after 7 seconds, it has a problem with the inverter.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor. But I don't think that's the issue here.

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.

Posted on Dec 01, 2012

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6 Suggested Answers

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9047 Answers

SOURCE: scrape or fix? Panasonic inverter genius sensor 1250 watt

In most cases, this is a problem with the inverter but it may be 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. You can find one here:

http://www2.panasonic.com/webapp/wcs/stores/servlet/vServiceLocator?storeId=15001

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

Posted on Dec 07, 2007

  • 1 Answer

SOURCE: Panasonic NN-C994S stop 2 sec. after I press Start.

Sounds like the power inverter

Posted on Apr 18, 2008

rickzilla
  • 706 Answers

SOURCE: burning wire smell

Hello jvtmad1,
All of the previous comments are relatively good ideas but let me offer some additional advice,
First off, You need to determine if the burning smell is coming from the Microwave itself or from the receptacle that provides power to it. Most wall receptacles are rated for 15 amps and should easily handle your microwave ovens power requirements. A simple check might be to run a hair dryer on the same receptacle without the microwave plugged into it. They draw comparable power so that should eliminate the recptacle as the culpret, On the assumption that the burnt wire smell is coming from the microwave itself, then your best bet is to return it to the store for a repair or replacement. Unless you are properly trained on how to sservice that, you probably shouldn't attempt it. As stated in previous comments, it should still be under warranty. If you have a bad filament transformer, magnetron or the wiring between them, that is not something you want to fiddle with yourself.
In summary, eliminate the receptacle on the wall as being the problem first.
If you find tha your receptacle is the problem, then you may be able to remove or disable power to it by switching off teh appropriate circuit breaker or fuse.. then take off the face plate and check the integrity of the wires going to that receptacle and making sure they are tightly secured to the terminals of the receptacle. I would assume that if that were the problem, you would notice a burnt smell as soon as you took off the face plate. Hope some of thes ideas help you resolve your problem...
Regards,
Rick

Posted on Nov 22, 2008

  • 4088 Answers

SOURCE: The microwave starts, then stops after a few seconds, and smells

Remove the cover after pulling the power plug. Check the transformer and large capacitor for signs of overheating. If they look ok, then remove the sheet metal wave-guide from the area where the energy enters the cooking cavity. Under the wave guide is a fan-like device called a stirrer that has a plastic bearing. This stirrer bearing is commonly arced over (when the oven is operated with nothing to heat in it). Usually the bearing looks good, but has arced internally. Replace the stirrer as a unit. The machine can be operated with the case off and a cup of water for a load, but keep you hands clear. Look for smoke.

Posted on Sep 07, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: my panasonic NN-T945SF starts, runs for a few

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.

Posted on Sep 12, 2009

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(((The fuse is located inside the unit along side the magnetron)))

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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.

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The microwave starts, then stops after a few seconds, and smells


Remove the cover after pulling the power plug. Check the transformer and large capacitor for signs of overheating. If they look ok, then remove the sheet metal wave-guide from the area where the energy enters the cooking cavity. Under the wave guide is a fan-like device called a stirrer that has a plastic bearing. This stirrer bearing is commonly arced over (when the oven is operated with nothing to heat in it). Usually the bearing looks good, but has arced internally. Replace the stirrer as a unit. The machine can be operated with the case off and a cup of water for a load, but keep you hands clear. Look for smoke.

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Purchased a panasonic NN-H965 microwave and yesterday when using it, it started making the following noise: upon starting, the unit works for 3 seconds with funny noises and then it stops. There used to be...


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.

If yours is not a Panasonic, please reply back with your brand and model number so we can help you.

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

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HI. your control board has failed. you will need to replace the control board asap if possible.

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Hi I am Vortash sounds to me as if the Magnetron is burning out and the heat sensor switch is turning the unit off as the mag gets hot ? .. you can get a cheap replacement of ebay but to be honnest microwaves are so cheap now you will probably get an oven for what you would pay for a new magnetron .. Regards Vortash

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There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.


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