Lennox 71M28 Control Board R-410A this specific assembly is optimized

this specific assembly is optimized for natural gas spark pilot applications

If your furnace or air handler codes for "Pressure Switch Open

Enables precise gas pressure adjustment to meet the specific BTU/h demands of high-capacity appliances

making it suitable for demanding environments like car washes

a critical tool for commissioning and troubleshooting leaky systems

Lennox 71M28 Control Board R-410A this specific assembly is optimizedThe Lennox 71M28 Control Board is a genuine OEM replacement kit (MCC1 1) designed for critical system management in Lennox, Armstrong, and AirEase packaged units. Also identified by part number 71M2801 and older designations like LB 106199A or 56M99, this integrated furnace control directs essential operations including ignition sequence, blower motor timing, and continuous safety circuit monitoring. Engineered for 120V AC applications, it is a direct