Lochinvar & A.O. Smith 100208660 Flow Switch

The Lochinvar & A.O. Smith 100208660 Flow Switch is a critical OEM safety component engineered to monitor fluid velocity within the primary heat exchanger loop. As a veteran-grade HVAC replacement part, this liquid flow switch utilizes a high-precision #1 paddle assembly to detect consistent water movement, preventing the dry-firing of high-efficiency boilers. It serves as a direct replacement for WTR2210, WTR2210K, and 100173714 part numbers. Specifically designed for the Lochinvar AWN series, this switch ensures that the burner sequence only initiates when the minimum required flow rate is achieved. The rugged construction of the 100208660 flow switch handles the thermal cycling common in hydronic heating systems, maintaining system integrity and operational safety. Field technicians often rely on this genuine Lochinvar boiler part for its exact fit in AWN151PM through AWN801PM models, providing a reliable electrical signal to the control board to verify circulation before ignition.

• Direct OEM Compatibility: Engineered specifically for Lochinvar AWN and A.O. Smith commercial boilers, ensuring seamless integration with existing control logic.
• System Protection: Proven flow detection prevents heat exchanger overheating by interlocking the burner circuit with actual water movement.
• Universal Cross-Reference: Replaces obsolete part numbers WTR2210 and 100173714, simplifying inventory for service contractors.
• Precision Paddle Design: The pre-installed #1 paddle is calibrated for specific pipe diameters to ensure accurate low-flow sensitivity.

• Which Lochinvar models use the 100208660? It is primarily used in AWN series models including AWN151, AWN200, AWN286, AWN400, AWN501, AWN601, AWN701, and AWN801.
• Can I use this to replace a WTR2210? Yes, the 100208660 is the current manufacturer-recommended replacement for the old WTR2210 and WTR2210K versions.
• What happens if the flow switch fails? If the boiler flow switch fails to close, the system will typically trigger a "no flow" lockout error to prevent damage to the heat exchanger.

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.