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Comination Microwave Make  Panasonic Model NN-A752W Problem Oven and grill work fine.  Since last week microwave function does not work. I have tried different power settings. All appears fine, lights, turntable and clock timer.  The trouble is that there is no heat imparted to the food at the end of the cooking time. I have found and checked 2 internal fuses - they are ok.

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Re: Comination Microwave

Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part
I would think it's not a door switch problem since the oven and grill work.

I'd say this is a problem with the inverter or a bad magnetron.

More importantly, 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:

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

Posted on Nov 28, 2007

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