Hi,Welcome to Just Answer, My name is XXXXX XXXXX forward to helping you today.
it is the timer thats the issue. the contacts stick and cause the issue, this timer is $80.00 at the following link. http://www.searspartsdirect.com/partsdirect/part-number/3951708/0026/110?pathTaken=directMatch&filterPart=&pop=flush&prst=0&shdPart=3951708 this will take care of your issue. the temp control board wouldn't cause that issue. hope this helps, thanks Bryan