Lennox 10W57 Circuit Board

The Lennox 10W57 Circuit Board is a critical OEM replacement component designed for high-efficiency residential gas furnaces and air handlers. Engineered for precision system control, this HVAC control board replacement serves as the primary logic center for blower timing, ignition sequencing, and integrated safety monitoring. It is the definitive direct cross version of R76700013 and also replaces part numbers R45632-001 and ICM AH4103, ensuring versatile compatibility across multiple product lines including 15CHAXA and 15CHPXA series units. This furnace control board features advanced diagnostic LED indicators to streamline troubleshooting and ensure consistent airflow during peak demand. For technicians performing a Lennox 10W57 installation, this board provides pre-assembled terminals and programmable logic to match specific BTU and blower capacities, maintaining factory-spec performance without the need for field soldering or complex modifications.

Key Benefits

• Broad Compatibility: Serves as a genuine Lennox OEM part for a wide range of Allied Air, AirEase, Concord, and Ducane systems.
• Precision Logic: Features Warming Response Technology (WRT) to maintain consistent room temperature and optimize blower speed settings.
• Streamlined Diagnostics: Integrated LED flash codes allow for rapid identification of system faults, reducing diagnostic time in the field.
• Rugged Construction: Built with high-grade PCBs designed to withstand the thermal stresses of continuous furnace and AC operation.
• Simplified Integration: Direct drop-in replacement for R76700013, matching original wiring configurations for faster recovery of system functionality.

Common Questions

Is the 10W57 board a direct replacement for my older Lennox unit?
Yes, the 10W57 is engineered to replace legacy part numbers including R76700013 and R45632-001. It is frequently used in 4PHP15E series and other high-efficiency air handlers, but we recommend verifying your specific serial number for exact matches.

Do I need to program this board after installation?
Many modern Lennox boards require matching the size code to your specific furnace BTU and blower capacity. If you see error code 203 upon startup, you must use the onboard push button to enter programming mode and select the correct lead code as specified in the installation instructions.

What does it mean if the blower fan runs continuously with this board?
A continuous blower often indicates a tripped limit switch or a specific thermostat configuration. If the board's diagnostic LEDs are not flashing a fault code, check the low-voltage wiring at the G-terminal and ensure the fan limit is not stuck in the open position.

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.