The Lennox 81L76 Control Board C2-3 is an OEM electronic control board designed for compatible Lennox furnaces and HVAC systems. It functions as the system's central control unit, monitoring operating conditions and coordinating essential components such as the blower motor, ignition system, and safety controls for reliable performance. Engineered for precise operation, it helps maint... https://www.partshnc.com/lennox-81l76-control-board