Lochinvar & A.O. Smith 100109243 Pilot Assembly

The Lochinvar & A.O. Smith 100109243 Pilot Assembly is a critical replacement component engineered for Flammable Vapor (FV) ignition systems in high-recovery domestic water heaters. Rated for 180 DEG C, this pilot assembly is designed to withstand the high-temperature environment of the combustion chamber while ensuring precise flame rectification. This assembly features a robust pilot burner, thermopile/thermocouple interface, and a pre-set electrode gap to maintain consistent ignition cycles. As an OEM water heater part, it ensures proper fitment and resistance to carbon buildup, which is essential for preventing nuisance lockouts and pilot outage issues in commercial and residential Lochinvar boiler parts and A.O. Smith water heaters. For service technicians, this assembly simplifies the water heater pilot light repair process by providing a direct-drop-in solution that restores the safety circuit to original manufacturer specifications without the need for field modifications.

• Temperature Resilience: Rated for 180 DEG C operation to ensure longevity in high-ambient combustion zones.
• OEM Compatibility: Precision-engineered for a seamless fit in specific Lochinvar and A.O. Smith FVIR models.
• Enhanced Conductance: High-quality sensing wiring provides a reliable microamp signal to the gas control valve.
• Corrosion Resistance: Built with high-grade alloys to resist oxidation and thermal stress over extended duty cycles.

What causes this pilot assembly to fail prematurely?
Repeated thermal cycling and carbon deposits on the sensor often lead to resistance issues. If the millivoltage drops below the dropout threshold of the gas valve, the system will fail to hold the pilot flame.

Is this part compatible with non-FVIR water heaters?
No, this assembly is specifically designed for Flammable Vapor (FV) ignition systems. Installing it in a non-compatible unit can lead to improper flame sensing and safety hazards.

Does this assembly include the pilot tubing?
This specific 100109243 configuration is typically supplied as the pilot burner and sensing assembly; confirm existing tubing integrity before installation.

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.