I have a micro that needs a helping hand.It goes thru the cycle,but doesn;t heat the food.I like to consider myself a fairly good diy person,so I was wondering if someone could tell me what makes the micro heat,and maybe I can buy the part and install myself.If this is beyond me,I guess I'll take it to a shop,and see if it's worth the dollars.It seems like part of the family,we've had it since 1982.Whirlpool HallOf Fame perhaps!!!!