After consulting KitchenAid and local repairman, I beleved that the control panel would need to be replaced. Luckily I searched online and discovered that the most likely culprit was the thermostat. Ordered from appliance part pros at 3:58 p.m. with standard FedEx ground shipping BUT before 10 am the next morning, the part arrived (via ground). It was an easy replacement, even for someone with modest skills, remove the back panels, remove and replace thermostat with two wires and two screws.... hundreds of dollars were save!