Customer Questions and Answers for Defrost Control Board by Whirlpool

Hello Adam, The adaptive defrost control is in the ceiling of the fresh food compartment. You have to disassemble the controls to get to it. Two 1/4 inch head screws almost straight up, one 1/4 inch screw straight back in the middle, and two Phillips head screws up in the assembly about halfway to the back into the ceiling. Disconnect the unit from the power supply before beginning the disassembly as there is not only 120Vac present in there, but there are those two light bulbs that get so very hot and will leave a scar before you can blink. As an after thought, you will need to completely defrost the unit as the control is designed to remove the frost from between defrost cycles but it can't melt off the ice-buildup from a long-time defrost circuit failure.