Lochinvar & A.O. Smith 100208372 Pilot Assembly

The Lochinvar & A.O. Smith 100208372 is a critical replacement intermittent pilot assembly engineered for high-recovery natural gas commercial water heaters and boilers. This specific spark-to-pilot ignition component serves as an exact OEM match for part numbers PLT2905 and PLT2905K, ensuring seamless mechanical and electrical integration. Designed to withstand the thermal stress of high-output combustion chambers, this assembly features a precision-aligned electrode and flame sensor to maintain consistent pilot flame rectification and prevent nuisance lockouts. Field technicians frequently specify this assembly for Lochinvar Knight and A.O. Smith Cyclone models where maintaining precise millivolt signal feedback is essential for the ignition control module's safety circuit. When performing a water heater pilot assembly replacement, this heavy-duty component ensures the burner reaches the required ionization threshold promptly, optimizing cycle efficiency and reducing mechanical wear on the primary gas valve.

Key Technical Benefits

• Direct OEM Compatibility: Engineered for a precise drop-in fit for 100208372, PLT2905, and PLT2905K, reducing downtime during emergency service calls.
• Reliable Spark Ignition: High-grade electrode construction provides consistent ignition arcs under varied gas pressures and humidity levels.
• Optimized Flame Sensing: Integrated sensor rod is tuned for flame rectification, ensuring the controller receives a stable signal to keep the main burner energized.
• Durable Construction: Built with high-temperature alloys to resist carbon buildup and oxidation in high-BTU commercial applications.

Common Technical Questions

Is this pilot assembly compatible with propane (LP) units?
No, the 100208372 is specifically calibrated with an orifice for natural gas water heater applications. Using this in an LP configuration will cause improper combustion.

Will this resolve an ignition lockout on a Lochinvar Knight boiler?
If your diagnostic code indicates a "No Flame Ignited" or "Flame Loss" error, replacing a fouled or cracked 100208372 pilot assembly is the standard corrective action to restore proper flame sensing.

Does this assembly include the ignition lead?
Yes, it is designed for direct connection to the existing high-voltage ignition cable, facilitating a secure spark pilot interface without requiring field splicing.

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.