Dacor Oven Shutting off

Our Dacor Convection oven burned up a lower element, which was easily replaced, but still displays error code F1 occassionally. We can use it, and it will work fine at times, and other times will just shut off, displays and everything but the oven light. We then push the button to display time, it comes back on and begins to work again. I suspect a control panel, how would one diagnose the panel.

Thanks for your help on this one. Thanksgiving’s comin’!