Paul D Punta Gorda , FL March 24, 2021 I was having error codes F20 and F34 while using the oven and F34 many times when not in use I did some research on my own and then spoke with the “Pros” at Appliance Parts Pros. Both confirmed the main board needed to be changed. The other less likely item was the oven sensor. I changed the sensor first as it was inexpensive. The error codes continued. Subsequently, I then changed the main board which was slightly difficult. When changing 2 screws hold the board in place on each front corner only. Also suggest you take a picture of wiring. I replaced wiring in place from old board to new to avoid wrong connection. Tight area to do work in place. Start to finish, the board replacement took about 45 min. Read More... 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Nut Drivers, Screwdrivers, Socket Set