• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...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.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

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ME21H9900AS Samsung microwave Troubleshooting E-83 code


Premium Member
Feb 13, 2021
Model Number
1-5 years
Hello, I have a Samsung over the range microwave (Model ME21H9900AS), we purchase it about 5 years ago but just recently pulled it out of the box to use it, so it's brand new. About 2 weeks after installing it we heard a beep and realized it was the microwave showing an E-83 code (door switch or control board failure). I unplugged power and reset everything with no issues. now it will randomly throw the code, sometimes several hours after being used, onetime I shut the door a bit harder than I should and it faulted, today it faulted and does not want to reset. I do not want to throw parts at it if I can help it, I know it should have 3 switches I can only see one that is obvious, is the control board in the door, does someone have a repair manual or recommendations on where to start. Thanks for looking.
it should have 3 switches I can only see one that is obvious,
Unplug the machine. Remove the control panel to access the interlock switch support assembly. All three microswitches are located on the the support.
Samsung switch support -w switches.jpg

Remove at least one wire from the switches and check for continuity by opening and closing the door. On your model it's cheaper to replace the support w/switches than the individual switches.
Rick, I appreciate the response I assume you mean the solid panel next to the switch support assembly because the control panel is on the door. How do you remove that panel? there is one screw at the bottom that does not loosen anything, there is one screw that I can see thru the vent on the top of the appliance. Do I need to remove the entire front of the microwave? Again Thank you
Rick thanks I finally figured it out, I had to remove 2 top screws above the door opening and slide the vent section left to remove it, which gave me access to the panel screw. I checked the switches the top and bottom switches are closed when the door is closed, the center switch is open when the door is closed. I closed the door several times and switches worked every time. If this is correct would you say it probably a bad control board? If so do you know what part number I need? I wish we would have used it before the extended warranty ran out. Again thanks for the response.
Where did you find the error code definition ? I haven't been able to locate any information on that model except the owners manual and that's no help.
E-83 code (door switch or control board failure).
If that's the correct definition that just leaves the door switches.
top and bottom switches are closed when the door is closed,
Are they open when the door is open. Did you remove the wires from the switch when testing? Do you have your tech sheet ? Look behind the top grill or inside behind the panel you removed. Can you post a copy here. I've been searching but no joy. At this point, without it, we're dead in the water.
Rick, I typed in e83 Samsung microwave and that is what it gave me I did not find one specifically for this model. The top and bottom are open when the door is open, on top I removed both wires the bottom I removed 1 wire. What is the tech sheet? The front panel has the opening to the blower and I could not see a sheet anywhere from the front. Could it be attached inside the back of the case?
What is the tech sheet?
Service information including the error codes and wiring diagrams. They're usually found in an envelope taped to an inside panel or behind the top grill taped to the top of the machine
The top and bottom are open when the door is open
And closed when the door is closed so they check good
the bottom I removed 1 wire.
That's fine if there's only two wires on the switch. When you unplug the microwave for several minutes then plug it back in, does it still show E83?
Rick I will dig into it more tomorrow to see if I can find the tech sheet. Correct switches worked as they should.
When I plug it in it will ask me to set the time, sometimes it will let me other times the buttons have zero response, after a few seconds it will display the e83 code, which will then change to a 0 after a few more seconds. If it codes on its own after sitting the e83 code will display indefinitely.
Try cleaning the end of the keypad keytail where it plugs into the display board.
Which plug is that on the board and what should I clean it with? I think I have some old spray contact cleaner.
The keytail is the flat ribbon connector for the keypad (there's only one connector) Use a pencil eraser to gently clean the silver tracers at the end of the keytail then re-seat it in the board connector.
Can you tell me how to pull the door apart the controls are on the front of the door, Thank you
I haven't had one apart yet. If it's like all the others, unsnap the choke from around the door from there you'll be able to see the screws for the inner door and display board. I couldn't find a video on my parts sites but you might want to check youtube.

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