Lochinvar & A.O. Smith 100109718 Burner Assembly

The Lochinvar & A.O. Smith 100109718 LP Pilot Burner Assembly is a critical OEM replacement part for liquid propane (LP) water heaters and boiler systems. As a veteran-grade LP pilot ignition assembly, this component is engineered to facilitate consistent flame sensing and main burner ignition in residential FVIR gas water heaters. For technicians troubleshooting a "pilot will not stay lit" code, this assembly provides a reliable fix by replacing the integrated thermocouple and pilot tubing in one unit. Its factory-spec orifice ensures precise fuel-to-air ratios, preventing carbon buildup and soot accumulation that often plague generic alternatives. Designed specifically for Lochinvar and A.O. Smith appliances, it maintains the integrity of the combustion chamber thermal cut-off system. This genuine OEM repair part is the standard choice for contractors looking to restore safe, high-efficiency operation to propane-fired heating equipment without the risks associated with universal kits.

Key Benefits

• Ensures accurate flame rectification and reliable main burner lighting.
• Includes a high-grade thermocouple designed for standard millivolt systems.
• Fixed LP gas orifice eliminates the need for field adjustments or sizing.
• Optimized for FVIR water heaters to prevent accidental ignition of flammable vapors.
• Simplifies repairs for Lochinvar and A.O. Smith propane units with a drop-in fit.

Common Questions

Can I use this assembly for natural gas (NG) units?
No, this part is strictly for liquid propane (LP) applications. Using an LP burner assembly in an NG unit can cause dangerous under-firing or incomplete combustion.

What is the primary cause of this part failing?
Standard wear on the thermocouple or a clogged pilot orifice due to fuel impurities are the most frequent reasons for replacement in propane systems.

Does this include the pilot tubing and mounting bracket?
Yes, this is a complete pilot burner assembly, providing the tubing and integrated sensing components required for a standard replacement.

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.