MODEL: WA-1220 Instruction on how to Remove the Control Circuit Board: Drain all of the excess water from the unit. Lay the unit down on its front side. Locate and remove the 11 screws on the back of the unit. Locate and remove the 2 screws on the edge of the bottom portion. Locate and remove another 2 screws on the edge of the bottom portion of the opposite side. Next, remove the housing but be careful when removing the front half, the control board will be connected to it. Locate and remove the two screws. Locate and remove the 6 screws on the Control board, then, remove the control board and replace with the new. Locate and remove the connector on the back of the Power Circuit board (connector may differ from type). The connector is attached to the original Control board so replace with connector from new board. After completing the replacement, test the unit to make sure that it is working properly before closing it up. Make sure to keep you hands and any objects clear from fan blades.