Question about Panasonic NN-S933BF Microwave Oven

1 Answer

Runs when door is opened, but not when closed.

When a time is set and the unit is started, it will turn on for approximately 2 seconds, then shuts off. After this it starts running as soon as the door is opened. I tried unplugging for a while to see if it may need to reset, but it continues to do this.

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  • Mike25655 Dec 18, 2008

    Microwave will run and will turn off as time program. When I open the door, it will start running again.

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  • Panasonic Master
  • 8,865 Answers

This is usually caused by either a bad door switch, a loose door switch mount (which are pretty simple problems to fix) or occasionally a problem on the control panel.

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

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:.

If you only need a switch, you can order a universal type from us for $5 postpaid.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

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

Posted on Oct 20, 2008

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