Lochinvar & A.O. Smith 100109293 Pilot Assembly

The Lochinvar and A.O. Smith 100109293 Pilot Assembly is a critical combustion component designed for high-efficiency water heaters and boilers. This FVIR pilot assembly features a 160-degree C thermal switch (Fixed Temperature) to ensure precise safety shut-off in the event of flammable vapor detection or excessive combustion chamber temperatures. Engineered for compatibility with Lochinvar and A.O. Smith atmospheric vent units, this genuine OEM part includes the pilot tube, orifice, shroud, and high-temperature wiring leads. It is essential for maintaining consistent pilot flame rectification and reliable ignition sequences. Contractors should verify the pilot assembly replacement requirements against the unit’s serial number, as the 100109293 replaces older part numbers such as 9003541005. Installing this genuine OEM water heater pilot ensures the burner manifold maintains its factory-specified UL/CSA safety certification and operational efficiency within sealed combustion systems.

• Oatmeal-style high-temp connector ensures secure electrical continuity under high-heat conditions.
• Integrated 160°C Thermal Switch provides essential FVIR protection and prevents hazardous venting conditions.
• Precision Orifice Design maintains a stable pilot flame for consistent main burner ignition.
• Durable Alumel/Chromel Lead Wires resist oxidation and brittleness over extended thermal cycles.
• Drop-in Fit for Lochinvar and A.O. Smith manifolds reduces downtime during service calls.

Does this assembly include the pilot tubing?
Yes, the 100109293 includes the pre-bent pilot gas line, internal orifice, and technical wiring required for a full installation.

Will this resolve a "Locked Out" status on an FVIR water heater?
If the thermal switch has tripped due to a high-limit event or flammable vapor detection, this assembly is required as the 160-degree C switch is typically non-resetting.

Is this pilot compatible with Propane (LP) units?
This specific assembly is configured for use with Natural Gas. Always verify your fuel type and orifice markings before completing the installation.

This item is not eligible for free shipping.

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.