Lochinvar & A.O. Smith 100109673 Blower Assembly

The Lochinvar 100109673 Blower Assembly is a critical combustion component designed for high-efficiency commercial boilers and water heaters, including Lochinvar Knight and A.O. Smith Cyclone series. Engineering specifications for this 100109673 induction fan focus on precise fuel-to-air ratios required for condensing heat exchangers. This assembly replaces legacy part numbers 100102146 and 6020-050, ensuring seamless integration with the existing control board and gas valve logic. The motor features high-torque performance under variable speed loads, maintaining stable static pressure for optimal flame rectification and heat transfer. Constructed with corrosion-resistant materials, this replacement combustion blower handles high-alkalinity flue gas condensate backflow effectively. This OEM blower motor is essential for technicians addressing F1 fault codes or fan speed modulation failures where precise RPM feedback is required for the integrated hall effect sensor to communicate with the flame safeguard controller.

• Direct OEM Replacement: Matches factory bolt patterns and wiring harnesses for Lochinvar and A.O. Smith units, reducing field labor time.
• Optimized Combustion: Precision-balanced impeller prevents vibration and ensures consistent airflow for modern pre-mix burner systems.
• Broad Compatibility: Cross-references with 100109673 and 6020-050 across multiple commercial boiler footprints.
• Rugged Housing Construction: Engineered to withstand the thermal stresses found in high-cycle commercial applications.

Does this blower assembly resolve an F1 error code on Lochinvar Knight boilers?
Yes, an F1 fault often indicates a fan speed mismatch or communication loss. This assembly provides the accurate RPM feedback required by the control module to clear these safety lockouts.

Is this 100109673 blower compatible with A.O. Smith Cyclone BTH models?
Technicians should verify the specific BTU input; however, this part is the standard OEM replacement blower for several high-efficiency A.O. Smith Cyclone water heaters.

Are any additional gaskets or mounting hardware required for installation?
It is standard practice to inspect the blower-to-burner gasket during installation. While this assembly replaces the mechanical unit, reusing compressed gaskets can lead to combustion leaks; a new gasket is recommended for a gas-tight seal.

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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.