Lochinvar & A.O. Smith 100167821 Board

The Lochinvar & A.O. Smith 100167821 Integrated Control Board is a critical OEM component designed for high-efficiency gas-fired boilers and water heaters. As a direct replacement furnace circuit board, this module manages essential system sequences, including hot surface ignition, flame rectification, and manifold gas valve actuation. It serves as the central processing hub, utilizing real-time sensor data to modulate thermal output and optimize combustion cycles. Built for professional-grade HVAC systems, the 100167821 board ensures precise temperature regulation and integrated safety monitoring to prevent dry-fire or overheating conditions. For technicians, this Lochinvar boiler control module simplifies troubleshooting through advanced onboard diagnostics, enabling rapid fault identification in commercial water heater parts. Whether you are performing a mid-season repair or a proactive system overhaul, this board provides the exact logic timing required to maintain peak AHRI thermal efficiency and operational reliability across compatible A.O. Smith and Lochinvar hydronic platforms.

• Precise Ignition Control: Manages the timing for hot surface igniters and gas valve sequencing to ensure reliable start-ups.
• Comprehensive Safety Monitoring: Continuously tracks flame signals and high-limit switches to protect the heat exchanger from damage.
• Advanced Diagnostics: Features status LEDs or digital feedback to streamline fault detection and reduce field labor time.
• OEM Compatibility: Engineered as a drop-in HVAC control board replacement for specific Lochinvar and A.O. Smith boiler models.

How do I verify if this board is compatible with my specific boiler model?
Compatibility should be confirmed by matching the 100167821 part number against your unit’s data plate or technical manual. This board is typically found in high-capacity commercial and residential condensing units.

Can this board help resolve "no-ignition" or "lockout" errors?
Yes, if the existing board fails to send voltage to the igniter or fails to sense a flame, upgrading to a new Lochinvar 100167821 can restore the ignition sequence, provided external sensors are functioning correctly.

Does this module require special tools for installation?
Installation requires standard technician hand tools. However, as an integrated furnace control, it must be installed by a qualified HVAC professional to ensure all wiring harnesses and ground paths are properly secured according to local codes.

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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.