The Daikin-McQuay 4018980 Printed Circuit Board is an electronic control component designed for compatible Daikin-McQuay HVAC equipment. It processes signals from connected sensors and system components to coordinate essential operating functions, including temperature regulation and equipment performance. Used in compatible air conditioning and heating systems, this circuit board hel... https://www.partshnc.com/4018980-daikin-mcquay-printed-circuit-board