Lochinvar & A.O. Smith 100137145 Fan Assembly

The Lochinvar & A.O. Smith 100137145 Fan Assembly is a vital OEM component engineered for high-efficiency combustion in commercial and residential heating systems. This 115V, 2.2 Amp combustion air blower provides the precise air-to-fuel ratio required for optimal firing conditions, significantly reducing emissions while maximizing thermal efficiency. Designed as a direct drop-in replacement, this assembly is functionally identical to part numbers FAN2712 and FAN2712K, ensuring seamless integration with existing control boards and gas valves.

Constructed with a heavy-duty housing and a balanced blower wheel, the 100137145 combustion fan utilizes a 12.5 MFD x 370 VAC capacitor to maintain consistent RPMs under varying static pressures. This assembly is a critical HVAC replacement part for a wide range of Lochinvar Copper-Fin and Knight units, including the CB, CW, and CF series. Technicians should verify boiler fan compatibility by checking the specific MFR numbers on the existing inducer to ensure a proper match for venting requirements and pressure switch signal parameters.

• OEM Compatibility: Exact replacement for Lochinvar and A.O. Smith parts 100137145, FAN2712, and FAN2712K.
• High-Performance Motor: Operating at 115 VAC / 60Hz, this blower motor assembly is built for the high-demand cycles of commercial hydronic systems.
• Improved Combustion: Stabilizes airflow to mitigate "low air" fault codes and prevent incomplete combustion in gas-fired boilers.
• Durable Construction: Engineered to withstand high-temperature environments, providing reliable service life for Lochinvar heating systems.

Common Questions

Is the capacitor included with the 100137145 fan assembly?
Yes, this complete assembly typically includes the pre-mounted 12.5 MFD capacitor and motor lead wires ready for terminal connection.

Will this resolve a "Low Air" or "Blower Proving" fault code?
If your Lochinvar boiler interface displays a low air error and the motor is drawing power but failing to reach speed, this combustion air fan assembly is the primary replacement component to restore proper pressure switch closure.

Can this part be used in A.O. Smith water heaters?
Yes, as an OEM part shared across brands, it is compatible with specific A.O. Smith commercial water heaters that call for the 100137145 part number.

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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.