Lennox 71M28 Control Board

The 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 fit for TCA, TGA, and THA series equipment, ensuring seamless communication between the thermostat and mechanical components.

For technicians performing a field swap, the 71M28 board incorporates an advanced microprocessor with integrated diagnostics and a seven-segment display. This allows for rapid identification of HVAC error codes, significantly reducing diagnostic time during service calls. When installing, ensure the board is correctly configured to the specific BTU and blower capacity of the unit to avoid error code 203. This robust HVAC circuit board is built to withstand high-cycle environments, providing stable voltage regulation and dependable performance in commercial and residential packaged HVAC systems.

• Broad Compatibility: Serves as a direct OEM replacement for 71M2801, LB-106199A, and 56M9901 across Lennox and Allied Air brands.
• Enhanced Diagnostics: Features an onboard display for real-time HVAC troubleshooting and fault code reporting.
• Precise System Control: Manages blower motor speeds and ignition timing to maintain optimal thermal efficiency.
• High Durability: Engineered to meet strict factory standards for HVAC control modules, ensuring long-term reliability in the field.

• How do I fix Error Code 203 after installation? This code indicates the board needs to be programmed to match the unit's size. Use the onboard push button to cycle to the correct letter code as specified in the installation manual.
• Is this board compatible with Lennox 71M2801? Yes, the 71M28 is technically identical to the 71M2801 and serves as a functional replacement.
• Can this control board replace an old MCC1-1 module? Yes, the 71M28 is the current OEM replacement kit for MCC1-1 control boards found in many rooftop and packaged units.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.