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I have a panasonic NNA883w combi microwave oven. The microwave part has stopped working. The unit dows not turn switches off after three seconds without warming anything. The oven and grill elements still work.

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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.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these inverter-based models.

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 25, 2008

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See if this describes what's happening:
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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 you;'re not in the US or Canada, see the support or service links at www.panasonic.net.

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

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Even though these are different symptoms, the same part may be causing both.

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

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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.

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

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