Replaced thermistor and PC board . Not exactly sure which one fixed it but in guessing the pc board and the thermistor wasnt but $15.00 or something so we decided just to change it too .. And use a small piece of masking tape on small screws removi g the pc board and you wo t have to fight with it so much . And you can number your wires or we just unscrewed board and took one wire at a time and connected on other board Oh , and unplug before you start . :-) Lisa from Mississippi .