Just as an aside, when using the "convection" oven feature, there is a chance that the oven will "go dark" after the cooking cycle. By going dark, I mean the panel is bank and the interior bulb is not on when the door is opened. This is the overheat thermistor triggering (ours goes off now at after about 30 minutes @ 350F). We open the door, let it cool down (and heat up the cabin đ). It cools down and resets. I have searched for a schematic for this oven but so far can't find one online. Maybe there is one inside the oven? As @topgun2 mentioned above, this particular problem should be an easy fix but not sure that is what is causing your problem.