Lochinvar & A.O. Smith 100157734 Inducer Draft Motor

The Lochinvar & A.O. Smith 100157734 Inducer Draft Motor is a critical OEM replacement component designed for high-efficiency commercial water heaters and condensing boilers. As a centrifugal inducer blower, this heavy-duty motor is engineered to manage the combustion process by effectively evacuating flue gases through the venting system. This ensures a consistent negative pressure environment, facilitating optimal airflow and combustion for peak thermal performance. For contractors servicing A.O. Smith Cyclone series units or Lochinvar Knight boilers (specifically matching the 100157734 part number), this high-torque motor provides the reliability needed for high-demand hydronic and domestic hot water applications.

This induced draft motor assembly is built for durability in harsh mechanical room environments. Weighing approximately 12.3 lbs, the unit features a robust housing and high-grade internal bearings to prevent common failure points like shaft seizing or excessive vibration. When a Lochinvar boiler inducer begins to fail, it often leads to pressure switch lockout errors or inefficient fuel-to-air ratios. Using this genuine 100157734 replacement part ensures seamless integration with factory controls and maintains the energy efficiency and low-emission profile of the original equipment.

• Optimized Combustion: Precisely regulates airflow to ensure safe and efficient venting of combustion byproducts.
• OEM Compatibility: Precision-engineered for a direct fit in specific A.O. Smith Cyclone water heaters and Lochinvar boilers.
• Industrial Grade Build: Designed to withstand the high thermal stress and continuous duty cycles of commercial heating systems.
• Ease of Installation: Standardized mounting footprint allows for rapid field replacement, reducing system downtime.

Common Questions

What are the signs that a 100157734 inducer motor needs replacement?
Listen for grinding, screeching, or increased mechanical vibration during the pre-purge cycle. If the boiler or water heater exhibits pressure switch codes or fails to initiate the ignition sequence, the inducer motor is often the primary culprit.

Is this a universal motor for all Lochinvar and A.O. Smith units?
No. This is a specific OEM part number. Technicians should always verify the part number in the equipment's manual or on the existing motor's nameplate to ensure compatibility with the specific appliance model and series.

Does this assembly include the necessary gaskets?
Standard field practice suggests inspecting and replacing the inducer gasket during any motor swap-out to prevent flue gas leakage. Verify your specific kit contents or order the required gasket separately to ensure 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.