Lochinvar & A.O. Smith 100208088 Door Gasket

Maintain the integrity of your high-efficiency heating systems with the Lochinvar & A.O. Smith 100208088 Door Gasket. Specifically engineered for KB/AW (Knight/Armor) boilers up to 501 models, this OEM replacement door gasket is essential for preventing energy loss and maintaining combustion efficiency. Fabricated from high-grade rubber, this component replaces legacy part numbers GKT2455, GKT2455K, and 100146555, ensuring a precision seal against the heat exchanger door. As a critical sealing element, it prevents the leakage of air and combustion gases, which is vital for safe and reliable unit operation. Designed for heavy-duty HVACR environments, this condensing boiler gasket preserves the pressure-tight seal necessary for the burner assembly's heat-retention performance. Whether you are performing annual preventative maintenance or resolving a standard combustion leak, utilizing a genuine Lochinvar rubber door gasket ensures the unit meets its original factory specifications for airflow and thermal containment.

• Precision Compatibility: Designed specifically for Lochinvar Knight (KBN080-500) and Armor (AWN/AWL) series water heaters and boilers.
• Industrial-Grade Materials: High-resistance rubber door gasket material handles high-temperature cycling without losing elasticity or sealing properties.
• Optimized Combustion: Eliminates air infiltration at the heat exchanger interface, protecting the burner assembly and improving energy efficiency.
• Drop-in Replacement: Directly replaces obsolete part numbers GKT2455, GKT2455K, and 100146555 for streamlined inventory management.

When should I replace the boiler door gasket?

For optimal reliability, the 100208088 gasket should be inspected during every annual maintenance cycle. If you notice brittle edges, visible cracks, or signs of gas leakage around the burner door, replace the component immediately to avoid efficiency loss or equipment damage.

Is 100208088 the same as GKT2455?

Yes, 100208088 is the modern manufacturer part number that serves as the direct replacement for the legacy GKT2455 and GKT2455K rubber gaskets. They are physically and functionally identical.

Do I need additional sealants when installing this part?

As a genuine OEM replacement part, this rubber gasket is designed to create a compression seal through mechanical fastening of the door. Ensure the seating surfaces are clean of debris before installation; typically, no additional RTV or liquid sealant is required unless specified by the latest service manual for your specific boiler series.

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.