Question about Panasonic NN-S951WF Microwave Oven

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Microwave, Panasonic model #NN-S951WF will not start. Electrical receptacles working. The fuse connected to the power cable has continuity. This has happened before but only briefly and when the unit operated it worked well. So I am surmising that it may be the door latches but how can I tell?

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  • lbenn Dec 25, 2008

    Thanks for your response but I have no display and no light when the door is open. I checked the fuse to the power cord and it has continuity (open). The door latches seem to be okay, took apart and checked the switches and when pressed they have continuity. I need to know where the wiring diagram is so I can check to see if its a circuit board.

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If you have a display and the inside light comes on when you open the door, it won't be the fuse.

First, please press and hold the Start pad for about 4 seconds to see if the child lock comes on. (This is detailed in the owner's manual).

If it does, that means the pad on the keypad is okay, and you can press and hold Stop to turn it off.

If it does not, then you may have a bad keypad.

I would suggest a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

You are correct to suspect the door switches, especially if the Start pad is okay.

This is usually caused by either a bad door switch or a loose door switch mount, which are pretty simple problems to fix.

Door switch or mount trouble is usually 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.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

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:.

Or see:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

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

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


Posted on Dec 25, 2008

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