Lochinvar & A.O. Smith 100167770 Control Board

The Lochinvar & A.O. Smith 100167770 Control Board is a critical integrated control board engineered for high-efficiency commercial gas water heaters and condensing boilers. As an OEM replacement control module, it manages the complex sequence of operations for Lochinvar Knight and A.O. Smith Cyclone series units. This HVAC control board interfaces directly with the blower motor, gas valve, and spark igniter to ensure precise combustion and thermal regulation. Designed for long-term reliability in demanding environments, the 100167770 provides the necessary logic for flame sensing, safety limit monitoring, and multi-temperature loop control, maintaining the hardware compatibility required for SMART SYSTEM architectures. When performing a field replacement, ensure all wiring harnesses are seated correctly to prevent communication errors or parameter mismatch prompts on the user interface. This genuine A.O. Smith part is built to exact manufacturer specifications to restore optimal system performance and boiler efficiency.

• OEM Precision: Direct replacement for 100167770, ensuring full compatibility with Lochinvar Knight and A.O. Smith Cyclone models.
• Integrated Logic: Consolidates ignition control, blower regulation, and safety monitoring into a single integrated control board.
• System Protection: Actively monitors flame signals and safety limits to prevent unsafe operating conditions.
• Plug-and-Play Installation: Designed with standard pin connectors for a straightforward swap-out by qualified technicians.
• SMART SYSTEM Ready: Supports advanced diagnostics and parameter settings for modern high-efficiency HVAC equipment.

How do I resolve a 'Parameter Mismatch' error after installation?
When installing a new 100167770 control board, the SMART SYSTEM may detect different settings between the board and the display. Technicians should use the 'Backup to Display' or 'Restore from Display' options in the setup menu to sync the boiler control parameters.

What are the signs of a failing 100167770 board?
Common indicators include irregular cycling, failure to initiate the ignition sequence, or persistent 'No Flame' errors despite a functional igniter and gas valve. Always check for 24V at the transformer before condemning the control module.

Can this board be used in high-altitude applications?
This specific integrated control board is designed for standard installations. For units operating above 3,000 feet, verify the specific high-altitude part number (e.g., 100167778 for certain Knight models) to ensure proper de-rate logic and combustion timing.

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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.