Manufacturer Name: International Comfort Products Product Number: 1177927 OEM Part Number: 1177927 The International Comfort Product The Defrost Board -1177927 is an essential feature of HVAC systems, especially heat pump equipment.This specific board is in charge of controlling the heat pump's defrost cycle to guarantee peak efficiency in cold weather. Frost and ice can build up... https://www.partshnc.com/1177927-international-comfort-products-defrost-board