Question about Panasonic NN-S933BF Microwave Oven

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Turns on with door open

Hello, we own a panasonic Invertor serial# 6A23280963 model# NN-S933BF Our microwave is turning on with the door open. It runs fine other than that. Presently we are having to unplug it to place our stuff in the oven. Then we plug it back in so we can run it. We just need to know how to reset the computer inside it so it will not run when we open the microwave oven door. Thank you for your assistance. Maria Stephenson

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Re: turns on with door open

It's likely that it's only the fan and light coming on when the door is open. But even so, it's not normal, and it should be fixed. It's not a reset issue. It's likely a broken door switch mount caused by a door slam or by inferior material, or a defective door switch caused by opening the door while the oven is cooking instead of hitting the "STOP" key first. You can do a Google search for my text file "doorsw.txt" which will give safety info and help in checking the door switches. Also, the plastic pieces on which the door switches are mounted should be checked, as well as the door alignment. It's usually the upper door switch or mount that causes this, but occasioanlly it's a problem on the control circuit board. Post again if more help is needed.

Posted on Oct 25, 2006

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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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