One of your interlock switches is out of adjustment. Behaving and to the left of the control panel is a bracket that holds the switches. When the oven is running, if you pull down or push up on the door, you may find it starts to work, or begins to do something else strange. All three switches must be actuated in the correct order for the oven to operate properly, so you may need to loosen the screws to the bracket and move it around to find the sweet spot to get the switches to actuate when the door is closed.