My range is a 1993 Electric drop in. JDC27G0P1BG Ser. # AG352437R, This is best I can read it. As I was cooking last night & heating oven to 425 deg. before reaching temp the range started beeping and the code -F3- started blinking and oven cut off. Then the code -F2- came up and it wouldn't stay cut off until the stove as a whole cooled down. I've lost manuel and need to know what this means.