Replacement Control Board

This replacement control board is engineered for precision fan speed regulation in HVAC systems across commercial and industrial applications. The 24VAC unit delivers optimal airflow management essential for efficient heating and cooling operation while maintaining consistent indoor air quality. Its advanced blower control technology enables precise speed modulation that reduces energy consumption and extends equipment service life in demanding environments. The board is compatible with a comprehensive range of equipment including Lennox G20, G20R, G23, G26, O23, OF23, and OHR23 series units. It also supports multiple allied brands including Armstrong, Concord, Ducane, Magic Chef, and Magic-Pak models, making it a versatile replacement solution for facilities operating mixed HVAC systems. The durable construction withstands rigorous commercial and industrial operating conditions. This component replaces multiple legacy part numbers including 48K98, 10X99, 35K77, 40L88, 78J61, 68H08, 65K29, 47J76, 45K48, 30H67, 621344-01, LB-90089A, LB-63622AA, LB-90676A, LB-89859, LB-87086A, LB-65126A, and LB-50709B, allowing for streamlined inventory management and simplified system upgrades. Ideal for HVAC contractors, facility managers, and maintenance professionals requiring reliable blower control solutions for Merit Series and compatible systems, this board delivers the precision control necessary for peak system performance and operational efficiency.