Lochinvar & A.O. Smith 100108373 Pilot Assembly

The Lochinvar & A.O. Smith 100108373 Pilot Assembly is a critical OEM component engineered specifically for natural gas-fired heating systems. As a genuine PB-5S Natural Pilot Assembly, this part ensures precise ignition of the main burner through a controlled, stable pilot flame. Professional HVAC contractors rely on the 100108373 for its robust construction and exact fit in high-efficiency boilers and water heaters, preventing frequent nuisance lockouts. This assembly is a direct replacement for legacy part numbers 194550-2 and 9000285015, maintaining strict adherence to original manufacturer specifications. By facilitating clean combustion and consistent natural gas pilot performance, it optimizes fuel delivery and system reliability. Whether performing routine maintenance or a critical repair, using this HVAC replacement part guarantees compatibility with Lochinvar and A.O. Smith gas-fired appliances, ensuring the unit operates within its designed technical parameters without the integration issues common in aftermarket alternatives.

• OEM Specification: Ensures seamless mechanical and electrical integration with Lochinvar and A.O. Smith heating equipment.
• Optimized Ignition: Provides a steady pilot flame, reducing ignition delays and improving overall burner efficiency.
• Direct Replacement: Supersedes part numbers 194550-2 and 9000285015 for streamlined inventory and installation.
• Natural Gas Compatibility: Specifically calibrated for natural gas applications to ensure safe and reliable fuel combustion.
• Durable Construction: Built with high-grade materials to withstand the thermal stresses of continuous pilot operation.

Is the 100108373 compatible with LP/Propane systems?
No, this specific assembly is designed and calibrated strictly for natural gas. For propane applications, a dedicated LP pilot assembly or conversion kit is required to ensure correct orifice sizing and pressure regulation.

What are the signs that my current pilot assembly needs replacement?
Common indicators include a weak or lifting pilot flame, frequent ignition failure (E02 or similar error codes), or physical oxidation and carbon buildup on the assembly that prevents proper flame rectification.

Does this assembly include the pilot tubing?
This is the complete PB-5S pilot assembly kit; however, it is standard practice to inspect existing pilot tubing for kinks or blockages and replace it if the integrity of the line is compromised.

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.