Manufacturer Name: International Comfort Products Product Number: RC6600002 OEM Part Number: RC6600002 The International Comfort Product An essential part meant to maximize the efficiency of HVAC systems is the RC6600002 Board-Main Control. The central nervous system of many HVAC devices, such as air conditioners and furnaces, is this control board. https://www.partshnc.com/rc6600002-international-comfort-products-board-main-control