Lochinvar & A.O. Smith 100208089 Blower Gasket

The Lochinvar & A.O. Smith 100208089 Blower Gasket is a critical high-temperature seal engineered for high-efficiency commercial water heater and boiler assemblies. As a veteran-grade OEM replacement part, this blower gasket ensures a gas-tight interface between the blower motor assembly and the combustion chamber, preventing flue gas leakage and maintaining precise combustion air pressure. This specific component is the direct successor to and a 100% compatible replacement for legacy part numbers GKT2034 and GKT2034K. Designed to withstand the thermal stress of constant cycling, it is a standard requirement for maintaining the 82% AFUE and high-thermal-efficiency ratings of the Lochinvar Knight and Copper-Fin series. Technicians should verify the seal integrity during any blower assembly maintenance to prevent CO leakage or erratic burner performance. This gasket features a precision-cut profile to match the venturi and fan flange perfectly, ensuring that the air-fuel mixture remains isolated from the mechanical room environment.

• Direct OEM Interchange: Fully replaces discontinued parts GKT2034 and GKT2034K with no modifications required for the blower assembly.
• Thermal Resilience: Manufactured from high-grade high-temperature sealing material to resist degradation caused by frequent combustion cycles.
• Combustion Precision: Maintains the critical air-tight seal required for proper pressure switch operation and stable flame signals.
• Extensive Compatibility: Fits a wide range of Lochinvar and A.O. Smith units, including the Power-Fin, Copper-Fin, and select residential/commercial boiler models.

Is the 100208089 compatible with older GKT2034 models?
Yes, the 100208089 is the official manufacturer-designated replacement for GKT2034 and GKT2034K. It maintains the exact same dimensions and material specifications used in the originally installed units.

What are the signs of a failing blower gasket in a Lochinvar boiler?
Look for soot accumulation around the blower flange, audible air whistles during the pre-purge cycle, or erratic pressure switch lockout codes. Replacing the venturi gasket during any combustion blower service is recommended to ensure a secure seal.

Does this gasket require additional RTV sealant?
No, this replacement gasket is designed to provide a dry, compression-based seal. Using liquid sealants may interfere with the precision fit of the blower flange and lead to future service difficulties.

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.