The Daikin-McQuay 4026841 Printed Circuit Board Assembly is a critical electronic control component designed to manage and coordinate the operation of compatible HVAC equipment, including air conditioners, heat pumps, and commercial climate control systems. It works by processing signals from sensors and system controls, then directing key functions such as temperature regulation, fan... https://www.partshnc.com/4026841-daikin-mcquay-printed-circuit-board-assy