Lochinvar & A.O. Smith 100112396 Control Board

The Lochinvar & A.O. Smith 100112396 Control Board is a critical OEM replacement part designed for high-efficiency hydronic and domestic hot water systems. This integrated furnace control manages the essential ignition sequence—including hot surface ignitor activation, flame induction, and gas valve modulation—to ensure stable combustion and precise thermal management. Engineering for the Lochinvar Knight and A.O. Smith boiler series, this printed circuit board (PCB) provides diagnostic feedback through onboard LED indicators, allowing for rapid troubleshooting of airflow, flame sensor, or limit switch faults. When performing a HVAC control board replacement, utilizing a genuine 100112396 module ensures full communication with existing system sensors and maintains the internal microprocessor logic required for condensing operation. Built to handle the rigorous duty cycles of commercial and residential heating, this ignition control board is the standard for restoring reliable appliance performance and safety.

Key Benefits:

• Precise Ignition Control: Orchestrates the full combustion cycle, from pre-purge to flame proofing.
• Direct OEM Compatibility: Engineered specifically for Lochinvar and A.O. Smith units, preventing the communication errors common with universal boards.
• Enhanced Diagnostics: Features microprocessor logic that tracks system faults, aiding in the fast identification of pressure switch or sensor failures.
• Industrial-Grade Build: Constructed with high-heat resistant components to withstand the environment of a gas-fired boiler cabinet.

Common Questions:

• Can this board replace a universal ignition module? No, this is a dedicated OEM part. Using a generic board can bypass secondary safety limits and compromise the unit's modulation capabilities.
• What does a blinking LED on this board indicate? The diagnostic codes typically highlight specific failures such as a blocked flue, weak flame signal, or a tripped high-limit switch.
• Is polarity sensitive on this board? Yes, like most electronic HVAC controls, ensuring proper 120VAC polarity and a solid ground is essential to avoid "No Flame" lockout errors.

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.