Lochinvar & A.O. Smith 100167819 Control Board

The Lochinvar & A.O. Smith 100167819 Integrated Control Board is a critical OEM replacement component designed for high-efficiency hydronic systems. This board is the direct successor to the RLY30061 and is specifically engineered for use with Knight WB 81-211 wall-mount boilers and KBN81-286 heating boilers with serial numbers beginning with H10. As a veteran technician, you know that maintaining the SMART SYSTEM control logic is essential for managing the prepurge cycle, ignition trials, and pump sequencing. This boiler control module oversees the firing of the spark electrode and the modulation of the combustion fan assembly to ensure optimal fuel-to-air ratios. Using a genuine Lochinvar replacement part ensures full compatibility with the existing wiring harness and safety sensors, including the flame sensor and blocked drain switch, preventing the communication errors often seen with generic alternatives. This integrated solution provides the precise low-voltage control required to protect your heat exchanger and maintain systemic efficiency.

• Direct OEM Replacement: Replaces RLY30061 without the need for mounting modifications or harness adapters.
• Diagnostic Capability: Supports the full suite of SMART SYSTEM diagnostics, allowing for rapid troubleshooting of fault messages.
• System Synchronization: Manages complex DHW priority and system pump logic to prevent thermal shock and ensure consistent output.
• Precision Modulation: Communicates directly with the blower and gas valve to maintain strict combustion levels.

• How do I verify if this board fits my specific unit? Check your serial number; this board is confirmed for Knight WB and KB models starting with prefix H10. For other ranges, a different revision may be required.
• What should I check before replacing the control board? Always inspect the F1, F2, and F3 slow-blow fuses on the current module. A blown 0.80 amp, 5 amp, or 6 amp fuse can often mimic a total board failure.
• Does this board require programming upon installation? While designed as a drop-in replacement, you must verify the installer parameters (accessible via the 5309 password) to match the specific application settings of the boiler.

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.