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and Nortek air handlers or furnaces
Mid-Point Grounding: Specifically configured for compatibility with Clean Burn internal circuitry and safety sensors
ensuring accurate pressure transmission while dissipating latent heat
low-impedance link for microprocessor-based burner control systems
A total failure shortly after startup usually indicates a direct short in the secondary circuit
Lennox 71M28 Control Board R-410A and Nortek air handlers orThe 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