Question about Microwave Ovens

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Doesn't work I just purchased a Panasonic Microwave on ebay, and plugged it in, and it worked for about 30 seconds. stopped and it says H98. Every time I try to get it going now, it just sits there and says H98 It does not have a model number but says "Genius Sensor 1250" 'Invertor" and is a full size 2.2 cubic ft unit.

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  • Anonymous Mar 16, 2014

    it will not heat and H98 shows up on it

  • Anonymous Mar 20, 2014

    I have a Panasonic Model #NNT945SFX 1250 watts microwave and the other day it quit working and an error number H98 appeared on the lcd screen area. I was told because it is a counter microwave and not built in, it's cheaper to just buy a new one and not bother with having it repaired as it's too expensive and also I read where a certain model of the Panasonic is not fixable. What do you think about this? It is the Genius Sensor 1250 Watt.

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  • Microwave Ovens Master
  • 9,011 Answers

No model number?? I'd be pretty suspicious why someone removed the model / serial tag!!

I'd be even more suspicious if someone sold you a microwave with such a serious problem without informing you of it in the auction item description beforehand.

H98 means you have a bad inverter, magnetron, or control board.

You can find a troubleshooting chart for this error code here.

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

Posted on May 22, 2008

After posting this, I discovered the model number (don't have it with me). Also, in the ebay post, it did, indeed say, that it does not heat. I called Panasonic, and they told me that it is still covered by the warranty. So, it is being taken care of.

Posted on May 22, 2008

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1 Answer

Microwave cuts off after 30 seconds


We would need to know the brand and full model number to be sure, but since you posted in the Panasonic section, I'll assume it's a Panasonic.

Panasonics have preset times in which it will shut off if certain failures occur.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor.

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter, controller, magnetron, or a bad connection from one or the other.

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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If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter, controller, magnetron, or a bad connection from one or the other.

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 Microwave Ovens

1 Answer

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If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter or a bad magnetron.

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.

Jan 04, 2009 | Microwave Ovens

1 Answer

Shuts off but everything else works


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.

If it stops after 22 seconds, that means the controller has detected a problem, usually 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.

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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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.
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1 Answer

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Panasonic NN-CS596S Convection Combi Steam Oven


The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

Let us know if the hard reset does not fix it.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor.

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter or a bad magnetron.

If you do indeed have a problem, Since it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

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.

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