Question about Microwave Ovens

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Microwave display window shows locked!!!!

Small grease fire on range oven cause microwave over the range to evidently overheat. Open the door and the light is on but push other buttons and nothing happens. Smart Sensor window display shows LOCKED. Is there a reset? Could not locate manual online. Please help with my problem or any ideas on how to solve problem.
Kenmore 721 - 62643200 1000 watt manufactured November 2002
Thanks.

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  • Jeff L G Sep 02, 2008

    I was able to locate a manual online thanks to the help of customer service rep at the 1-800 # for Sears. I perused the manual and found that the only possible solution could be the child lock had been activated and the microwave overheated. I pressed and held the start/lock button for 4 seconds and it unlocked the microwave.

    Thanks for your suggestion, because I was really getting a little nervous. Hope this will help someone else in the future.

    Thanks again.

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  • Microwave Ovens Master
  • 8,820 Answers

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

Let us know if the hard reset does not fix it.

There may be grease or soot on the control panel causing a lockup, and it may need circuit board cleaning / repair or a new keypad.

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

Posted on Sep 01, 2008

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My Frigidaire ffmv162lw Microwave just shows "0:05" on the display and no buttons work.


You have a shorting membrane keypad. And you are correct - if and when an oven is coming on or doing anything by itself, this is very dangerous and can result in a fire.

So until it is repaired, please leave it unplugged or leave the door open when it's not in use, and of course one should never leave a microwave unattended while cooking, especially if it's doing this!

The details of my answer assume that your model number (from the tag on the microwave, not the manual) is FFMV162LWA (white). If not, please let me know.

On these models, the membrane keypad is not available as a separate part, so you would have to order the control panel frame assembly which comes with a new keypad.

In this case, you simply move your circuit board into the new frame. That is a simple do-it-yourself job.

You can order part number 5304477374 from the Sears Parts Direct Web site for $98.65 (prices subject to change).

There is a video here showing how to remove a typical over the range control panel assembly in under 5 minutes.

Then detach the keypad connector as shown in the photo below, and then remove the control panel screws.

Be careful not to crack the glass display when handling it, or it's a goner.

keypad_connector.jpg

Some connectors have a lock. positivelock.jpg
Reassembly is the reverse of disassembly.

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What caused this to catch on fire?


its the grease that has got into it replace it and allways keep it clean

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Hello :

This happens because of a bad door switch . The plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door .

Check also the turntable . It could be out of it's right place .

WARNING :

1:Don't slam your microwave door because this may cause the fuse to blow and this is the reason of bad door switch problem .
2: A microwave is capable of giving you a serious electrical shock even when it's unplugged , so I recommend you to call a repair technician for help .

please don't forget to rate .

good luck .

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Hope this may help;

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