This high quality Genuine OEM Samsung Main Control Board (DA94-02663A) is a PCBA (Printed Circuit Board Assembly) manages the functions of the refrigerator such as cooling and defrost times. The Main Control Board is also called the Electronic Control Board or Main PCB (Power Control Board). Repair your appliance with confidence when you choose Genuine Samsung Factory Parts & Accessories. Please be aware that it is recommended to disconnect the appliance from all utilities prior to installation of the Main Control Board.