Lochinvar & A.O. Smith 100208093 Door Gasket

The Lochinvar & A.O. Smith 100208093 Door Gasket is a critical OEM replacement part engineered specifically for high-efficiency commercial boiler maintenance. This rubberized burner door gasket ensures a high-integrity hermetic seal between the combustion chamber and the manifold assembly, preventing hazardous flue gas bypass and maintaining precise HVAC manifold pressure. Designed to withstand the thermal cycling associated with the KBN600-800 series, this 100208093 gasket replaces the legacy GKT2063 and GKT2063-100208093 part numbers. For technicians performing annual boiler heat exchanger inspection, replacing this seal is a non-negotiable step to avoid flame fail ignition errors and air pressure switch trips. Maintaining the structural integrity of the burner door seal is paramount to preventing boiler overheating and ensuring the safety and longevity of the stainless steel heat exchanger components. Utilizing genuine Lochinvar parts like the 100208093 guarantees compatibility and performance that generic alternatives cannot match, especially in hydronic heating systems where seat-sealing is vital.

• Optimized Combustion Efficiency: Prevents excess air infiltration, ensuring the Smart System control board reads accurate CO2 and O2 levels during combustion analysis.
• High-Temperature Durability: Constructed from industrial-grade rubber designed to resist hardening and cracking under constant thermal stress.
• Direct OEM Fit: Eliminates the risk of misalignment that common "universal" gaskets cause, which often leads to igniter or flame sensor failure.
• Vibration Dampening: Helps reduce resonance and noise during high-fire operation by securing the burner assembly interface.

• Does this gasket replace the GKT2063? Yes, the 100208093 is the current manufacturer-specified replacement for the older GKT2063 part number.
• What models is this part compatible with? It is primarily engineered for Lochinvar Knight and A.O. Smith boilers, specifically the KBN600 through KBN800 high-input models.
• Should I use sealant with this gasket? Per manufacturer service manuals, the door gasket should be installed dry. Using petroleum-based sealants can degrade the rubber and compromise the combustion chamber 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.