Manufacturer Name: Carrier Product Number: HH84AA020 OEM Part Number: HH84AA020 The Carrier HH84AA020 Control Board is a critical component in HVAC systems that manages and regulates various system functions. This board serves as the central control unit, receiving signals from sensors and user inputs to coordinate the operation of HVAC equipment like furnaces, air conditioners, ... https://www.partshnc.com/control-board-for-carrier-part-hh84aa020