Lochinvar & A.O. Smith 100145006 Fan Assembly

The Lochinvar 100145006 combustion fan assembly is a precision-engineered blower designed for high-efficiency hydronic boilers and water heaters. As a direct replacement for Lochinvar FAN3033, this unit is critical for maintaining the correct air-fuel ratio within the combustion chamber. It is compatible with several Lochinvar Knight and A.O. Smith Cyclone models, providing the high-static pressure required to overcome heat exchanger resistance. This assembly features a robust motor designed for variable frequency drive control, allowing for precise boiler modulation. Proper installation ensures optimized thermal efficiency and stabilizes the flame signal to prevent nuisance lockouts. When performing a combustion fan replacement, verify the integrated harness and mounting flange alignment to ensure a gas-tight seal. For technicians managing commercial water heater repair, this OEM component ensures the system meets its original factory venting specifications and CO2 production profiles.

Key Benefits

• OEM Compatibility: Identical replacement for FAN3033, ensuring exact physical fit and electrical integration.
• Variable Speed Control: Supports precise boiler firing rates to maximize energy efficiency and minimize cycling.
• High-Static Performance: Engineered to handle the specific flue pressures found in Lochinvar Knight boilers.
• Direct Connection: Features the standard multi-pin molex connector for seamless integration with the ignition control module.

Common Questions

What are the signs of a failing 100145006 fan assembly?
Common indicators include increased mechanical noise, "Failed to Ignite" or "Low Fan Speed" error codes on the control board, and inconsistent combustion during high-fire operation.

Is the 100145006 blower compatible with all A.O. Smith Cyclone units?
It is used in specific Cyclone models like the BTH-120 through BTH-250. Always cross-reference your specific model and serial number to ensure an exact match.

Does this assembly include the fan gasket?
Standard field practice recommends replacing the mounting gasket whenever the fan is pulled to maintain pressure integrity; check your current inventory for the appropriate flange seal.

This item is not eligible for free shipping.

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.