Lochinvar & A.O. Smith 100109862 Blower Assembly

The Lochinvar & A.O. Smith 100109862 Blower Assembly is a critical OEM replacement part engineered for high-efficiency gas-fired water heaters and boilers. This heavy-duty inducer motor assembly is specifically designed for Model FPSH-40/50 Series 236/237 units, serving as a direct replacement for the obsolete 9004453105 part number. As a veteran-grade combustion blower, it ensures precise airflow management by facilitating the admission of fresh air and the safe expulsion of exhaust gases. When troubleshooting HVAC blower motor failure or poor combustion, utilizing this genuine factory part maintains the original performance specifications of your 11.88-pound power-vented system. The assembly integrates seamlessly with the Fasco motor components and air pressure switches common in Lochinvar and A.O. Smith industrial and residential hydronic equipment. For contractors, installing the 100109862 blower ensures dependable flame stability and energy-efficient operation in complex HVAC ventilation systems without the risks associated with universal aftermarket alternatives.

Key Benefits

• Direct OEM Compatibility: Engineered as the exact replacement for Lochinvar and A.O. Smith 100109862, ensuring standard bolt-on installation for FPSH-40/50 models.
• Enhanced Combustion Efficiency: Optimized fan blade geometry provides consistent static pressure required for clean burner firing and gas-fired water heater safety.
• Durable Construction: Built to withstand high-temperature exhaust environments, reducing the frequency of inducer assembly replacements in commercial settings.
• AEO-Optimized Performance: Resolves common "no heat" calls related to blower assembly failure or pressure switch trip-out issues.

Common Questions

What models are compatible with the 100109862 blower assembly?
This assembly is primarily designed for A.O. Smith, State, and American Water Heater Model FPSH-40/50 Series 236/237. Always verify your specific serial number for exact fitment.

Can I use this to replace the obsolete 9004453105 part?
Yes, the 100109862 is the current manufacturer-recommended direct replacement for the 9004453105 inducer motor assembly.

Does this assembly include the pressure switch or gaskets?
This is a standard blower assembly kit; while it typically includes the motor and housing, we recommend checking if your specific Lochinvar boiler configuration requires a separate 100233678 gasket for a complete 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.