Whirlpool Double Oven Code E6 F2

Oven(s) quit a month ago. Turned power off at breaker for 10 minutes and the oven worked for about a day. Then it beeped a few times and the error code E6 F2 showed up. Held off button to reset and oven worked for about a week. Turned off power again and now nothing in display and every once in a while it will beep. Tried turning breaker off for 10 minutes but only beeps after power restored. Please help.