My microwave was shouting with the numbers 2222 for the past one weeek and i used to always unplug it unless i use it.. from yesterday it was ok with and this morning when i used, it suddenly went off n nothing is working.. i unplugged it for some time , i kept on holding the reset button for a minute.. but nothing worked.. model is chefmate P70D020AL..Help me..

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.



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

It should be pasted to the inside of the casing, but do you know what you are doing?

The transformer and capacitor in the magnetron circuit of a microwave typically produce 2000-4000 volts at 500 mA, quite enough for you to ride the lightning bolt if you touch it. This may be so EVEN IF UNPLUGGED.

Don't mess with it anymore unless you have the clear knowledge. Take it to a qualified service tech.

you have a bad keypad, have it checked by a good tecn. it could just need some re-soldering (connector)

Have fun!

contact emerson @ 1-800-909-1240 option 3 is microwave. Make sure you have model number and serial number. We are having the arcing problem and burning smell. They will pick up check and replace.

I have the same problem with my microwave and i cant fix it help?

Most probable failure is this VERY expensive part:
http://www.appliancepartspros.com/part_details.aspx?part_id=4327040&image=1

This is what controls the Magnetron operation via the relay on the PCB. If the Magnetron is operational without programming it usually is the cause of the problem.

I would recommend that all wiring to the control board be verified before considering replacement of the board. The price of the board to me is off the charts in cost! Not sure what the original purchase cost was but the price of this board would make one consider unit replacement vs component replacement when you add in the cost of the service call.

I am sure this is not what you wanted to hear.

Thanks for using FixYa,

Kelly

probably blew the magnetron or high voltage transformer DONT test either unless u discharge the capacitor possible shock risk that unit is still live even unplugged.... i wanna telll you these days that micros are disposable items because the parts are gonna cost more than just to buy a new one plus if any arching occured that same problem is gonna occur again if it did work so basicallly that miro is kapout... hope this helped

Possibly the internal fuse. Unplug unit, remove all case screws on the back of the micro. Slide the case toward the back and remove. Look for a glass tube type fuse, simular to automotive fuses of the past. It should be located near the controls. If bad, I have been able to find replacements at Radio Shack. If the fuse is good, I'm sorry, it's beyond my microwave knowledge level.

Yes, there should be a ceramic (tubular) fuse under the cover on the top side where the power comes into the microwave.

F3H —Humidity Sensor Failure: Refer to the Tech Sheet and test the sensor.
The microwave oven may be provided with a self diagnostic routine that can be operated through the touch pad keyboard. To enter the self-diagnostic routine:
1.While pressing the CANCEL keypad:
a) Open the oven door.
b) Unplug the microwave oven for 2-seconds and plug it back in.
c) Release the CANCEL keypad and close the oven door. You will see the following display.
CHART
NOTE: The humidity sensor test results will appear on the display after 8-seconds.If the tests are successful, "OK " will be displayed. If one or more of the tests fail, "ERR " will be displayed.. 2.When a keypad is pressed, a number according to the test chart will be displayed. When no keypad is pressed, a blank "—" is displayed.
If you want to try to fix it your self, Always remember Electricity is dangerous and should be treated with respect.
Microwaves are very dangerous, they can still shock you even unplugged!!
Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it. With the microwave unplugged.
If my attachment made it, it shows a common way to do this....
Good Luck!
Always remember Electricity is dangerous and should be treated with respect.
Microwaves are very dangerous, they can still shock you even unplugged!! These pages are to help give you indications of what might be wrong and some safe "how to check" or repair help.
Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it. With the microwave unplugged.