Allen H Pepperell , MA December 23, 2016 Upper oven would not maintain heat it would heat up at the start to say 350 but would not refire to keep it there The control panel was the problem and after watching your "How to" it was easy. Happy wife, happy life! One thing I would recommend is a magnetic screwdriver. Drop one of the board screw down into the back of the oven and it won't be fun finding it! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes