Question about Panasonic NN-S251 Microwave Oven

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Panasonic NN-2501 Microwave Oven range hood

My son was using the microwave, he opened the door to turn the plate inside, when he shut the door and pushed the start button, the timer still counted down and the interior light goes on, but no motor runs. Could this just be a fuse or is it the motor to the microwave? The fan for the range hood still works, just the microwave part is what is not working.

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Re: Panasonic NN-2501 Microwave Oven range hood

I know that this is an old post but a really common problem. The secondary interlock switch is bad. This problem is caused by only one thing : Opening the door while the unit is in cook mode. This action burns up the contacts in that switch. This bad habit causes about 60% of all microwave oven 'deaths'. The switch sticks closed and the monitor switch blows the monitor fuse, to prevent the possibility of the unit cooking while the door is open. Push the stop button before opening the door and your microwave oven will 'live' three times longer. At least from this condition....

Posted on Sep 20, 2013

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Re: Panasonic NN-2501 Microwave Oven range hood

It is possible that the magnatron is bad but hard to say on a no heat problem without checking all components. A lot of model give 5-7 yr warranty on that part.

Posted on Oct 05, 2007

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I can help with that, but please feel free to contact me directly through our site link via our Fixya link at

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This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

Door switches are most often damaged by opening the door while it's cooking (instead of pressing Stop / Clear first) or food
/ grease debris in the switch.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya:

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This usually indicates damage to the circuit board of the control unit assembly. We repair these control units nationwide for only $32.50 postpaid. If you decide first to remove or replace the bulbs or check the sockets or wiring, please unplug the microwave first. Failure to do that is usually how the boards get damaged. If you or a friend decide to work on it, we have *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa: You can usually find helpful exploded view diagrams and order parts by entering your base model number (without the suffix) here: BUT - I don't recognize NN-2501 as a valid model number. Could you confirm that? Thanks!

Feb 18, 2007 | Panasonic NN-S251 Microwave Oven

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