My wife was trying to use oven when the code F1 appeared. We shut the oven off and unplugged it and it, reset itself. Everything was fine I thought. Here are the symptons. I turn the thermostat to lets say 350 degrees. Push the start button. The ovens heats up for a few minutes to what I believe is the preheated tempeture of 350 degrees. Then the eoc starts to beep. And the pre heat button starts flashing. And I could hear a poofing sound. Like the sound a propane grill makes when you turn off the burners. I heard that a few times like it was turning on and off. At that point my cheese bread was finished. Oh and all the burners up top seemed to be working properly. I would appreciate any advice or suggestions.

Thanks Joe