I had an F2 error. Replaced the Power Relay Board after confirming temperature sensor was working correctly. At first I still could not get oven to turn on but realize that it will work once the bottom oven has been used or is warm (?). When the unit is cold the top unit will not turn on and sometimes gives me an F5 error code. I have checked all of the connections on the board but feel like I am missing something simple.
Any clues??