I have a Kenmore In-wall oven. Model # 911.47485991, serial # 9T6455200. It was here when I bought the house, and I don't have the owners manual. The oven will be off , and then I get an error code of F7, and it starts beeping, and the temperature shows 350 degrees, and it says "Push Button". If you shut it off, it will come back on about 30 seconds later! Does anyone know what this code means, and or what do I have to replace? My e-mail address is Marty_j_us@yahoo.com