Description
The Lochinvar & A.O. Smith 100289462 is an OEM replacement rubber burner door gasket designed to maintain a proper combustion seal on compatible Lochinvar and A.O. Smith water heater and boiler equipment. Replacing a worn or damaged burner door gasket is a critical maintenance step — a compromised seal can lead to combustion gas leakage, reduced efficiency, and unsafe operating conditions.
Product Overview
This rubber gasket is engineered to fit precisely around the burner door assembly, providing an airtight seal that keeps combustion gases contained within the heat exchanger. Using a genuine OEM part ensures correct material compatibility, dimensional accuracy, and long-term durability under repeated thermal cycling.
Key Features
- OEM replacement part for Lochinvar and A.O. Smith equipment
- Rubber construction for flexible, durable sealing performance
- Designed for burner door applications to maintain combustion integrity
- Ensures proper fit and reliable seal to help prevent combustion gas leakage
- Supports safe and efficient equipment operation
- Direct replacement — no modification required
Application
- Compatible with select Lochinvar and A.O. Smith water heaters and boilers
- Intended for use during routine maintenance or burner door service
- Recommended replacement whenever the burner door is removed for inspection or repair
Why Replace Your Burner Door Gasket?
Over time, rubber gaskets can harden, crack, or compress permanently due to repeated heat exposure. A failed burner door gasket can allow flue gases to escape the combustion chamber, posing safety risks and reducing appliance efficiency. Replacing the gasket with a genuine OEM part restores the original seal integrity and helps extend equipment service life.
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