I attempted to use my oven's time cook option tonight. I placed the temperature to 400, then place the mode knob to time cook. I set the start time, then set how long to cook for. When I arrived home, the fan to the over was on, and the timer was counting down, but the heating ellement was not on. The oven was in the house when I moved in, and I do not have an owner's manual for it. I do not know what I did wrong.