Lochinvar & A.O. Smith 100233673 Gasket

The Lochinvar and A.O. Smith 100233673 is a critical Gasket Air/Arm component designed specifically for maintaining the combustion seal in high-efficiency Armor gas-fired water heaters and Knight heating boilers. This OEM replacement gasket ensures a gas-tight interface between the air inlet arm and the blower assembly, preventing dangerous exhaust leaks and ensuring optimal excess air ratios during the modulation cycle. Engineered high-temperature material properties allow it to withstand the thermal cycling common in condensing boiler applications. For contractors performing a heat exchanger teardown or annual maintenance, replacing the 100233673 burner gasket is a standard protocol to prevent carbon monoxide leakage and maintain combustion efficiency. This part is cross-compatible with several legacy A.O. Smith commercial water heaters and Lochinvar AWN series models, providing a precise fit that generic aftermarket seals cannot replicate during high-pressure operation.

Key Benefits for HVACR Technicians

• Engineered Fit: Designed as a direct OEM replacement part for Lochinvar Knight and A.O. Smith Armor systems.
• Combustion Security: Provides a gas-tight seal to maintain proper static pressure within the venturi and blower assembly.
• High-Temperature Durability: Resists degradation from constant thermal cycling and flue gas condensate exposure.
• Efficient Maintenance: Essential component for preventative maintenance kits to avoid nuisance lockouts or combustion failure.

Common Technical Questions

When should the 100233673 gasket be replaced?
This gasket should be inspected during every annual service and replaced if the seal shows signs of compression set, tearing, or if the blower arm is detached for any reason.

Is this gasket compatible with the Lochinvar WHB series?
Yes, it is used across multiple Lochinvar and A.O. Smith platforms where the standardized air arm assembly is utilized. Always verify your specific model and serial number for exact fitment.

Does this seal prevent CO leaks at the blower?
Yes, its primary function is to secure the combining air/gas mixture before it enters the burner, ensuring no combustion byproducts escape into the mechanical room.

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.