Lochinvar & A.O. Smith 100233498 Inducer Fan Assembly

The Lochinvar & A.O. Smith 100233498 Inducer Fan Assembly is a precision-engineered OEM draft inducer blower designed for high-efficiency commercial and residential water heaters and boilers. This assembly, also identified by part number FAN2403, is the critical component for pre-purging the combustion chamber and establishing consistent static pressure for safe, clean burner ignition. Built to withstand the high-temperature flue gases associated with Lochinvar Knight and A.O. Smith Cyclone series units, this 100233498 inducer motor ensures the proper venting of combustion byproducts through the exhaust system.

Field technicians will recognize the importance of the factory-calibrated impeller and housing, which work together to prevent pressure switch trip-outs and operational lockout codes. Using this genuine OEM replacement part ensures the unit maintains its original AHRI efficiency ratings while preventing premature wear on the heat exchanger. Whether you are performing a seasonal teardown or responding to a failure in a high-demand mechanical room, this combustion blower assembly provides the exact electrical specifications and mounting footprint required for a direct-drop-in HVAC repair.

Technical Benefits for Contractors:

• Exact Match Compatibility: Directly replaces 100233498 and FAN2403, eliminating the need for field modifications or bracket adjustments.
• Optimized Combustion: Delivers the precise CFM required to maintain high thermal efficiency and low CO levels across the firing range.
• Industrial Grade Construction: Features high-temperature bearings and a balanced assembly to minimize vibration and audible noise in residential applications.
• Reliable Exhaust Venting: Hardened housing resists corrosion from acidic condensate found in high-efficiency condensing boilers and water heaters.

Common Questions Regarding Part 100233498:

What are the symptoms of a failing inducer fan?
Common signs include a high-pitched bearing whine, a "failed to prove" error on the integrated control board, or the pressure switch failing to close due to insufficient static pressure.

Is this compatible with both Lochinvar and A.O. Smith equipment?
Yes, as these manufacturers share common engineering platforms for their high-efficiency water heaters and boilers, this part is the approved OEM replacement for both brands where specified.

Does this assembly include the necessary gasket?
It is standard practice to inspect and replace the inducer gasket during installation to ensure a vapor-tight seal against the collector manifold.

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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.