Hi everyone I joined the F2E1 club about two years ago when both my wall oven and separate microwave oven started pining/flashing the error message. The microwave panel was replaced under warranty a year before and it still failed. I was planning on bypassing / hijacking the signals from the touch panel buttons and mimicking them with a WiFi enabled microcontroller (was thinking ESP32 or a raspberry pi) but in my testing/diagnosing I think I stumbled onto a solution. The solution hasn’t been time tested yet (it’s been about a week) but it seems to be working. I wanted to share it with this great group of problem solvers in the hope that it helps someone.
THE SOLUTIONION: splice/solder/shield in 10 ohm resistors (not 10k ohm resistors) to each of the wires on connector harnesses for the left and right button panels. See pictures below. You will need to do this to all ten wires. I tried a combination of doing some/not others and had consistent, error free resulting by doing all 10. The only drawback is that the lighting for the buttons is effected, some dim, some come on/off, some work just fine but in the end no error messages, and all functionality works. If above is not clear, let me know, I can provide more information.
How I got there: As I mentioned, I was planning on high-jacking the signal and driving the button functionality with a wifi controlled microcontroller (then using a webapp on my phone to “push buttons) and/or add external physical buttons to mimic the functionality. When I setup a “test rig” using a breadboard (see below), the panel started working. It turns out that adding the extra wires, created about 10 ohm resistance on the lines and that seemed to do the trick. Anyway, good luck hacking and reach out with questions. Happy to help if I can.
P.S. I will post my specific wall oven and microwave oven model numbers later if that is helpful.