First disconnect the power from the unit. The most difficult part if you have a built in oven is removing the oven from the cabinet. You will need to unscrew the unit from the cabinet and slide it forward about 10 inches in order to remove the panel covering the board. Once you remove the top cover the board will be fully accessible. Either mark or photograph the wiring connections locations for proper reinstallation. The plugs are designed so that they will only fit in their correct locations but there are two black wires that could easily be crossed. Reverse the procedure for installation.