The F7 error will come on while baking and sometimes completely unprompted. Often, after pressing stop and canceling the beeping that comes with the error, the bake and broil buttons stop working. Turning the oven off and then back on does not fix the problem. It's intermittent, but when it starts, it generally continues for a while and I have to leave the oven powered off. The manual says that an F7 error is related to the keypad.