Lochinvar & A.O. Smith 100109960 Gas Valve

The Lochinvar & A.O. Smith 100109960 Gas Valve is a direct replacement natural gas control valve engineered for precision fuel regulation in high-efficiency water heaters and commercial boilers. This OEM Honeywell gas valve (part number 194536-5) is designed to manage the flow of natural gas to the burner assembly, ensuring safe ignition and consistent thermal output. It features a compact solenoid design with integrated pressure regulation, allowing for precise manifold pressure adjustments during commissioning. This millivolt gas valve interface ensures compatibility with standard 24V control circuits typically found in Lochinvar Knight and A.O. Smith Cyclone models. When troubleshooting flame rectification issues or irregular gas pressure drops, replacing a failing valve with this genuine HVAC replacement part restores factory-spec combustion performance. This component is essential for maintaining the AFUE rating of the appliance while preventing hazardous gas leaks or intermittent burner lockout cycles.

• Precision Regulation: Maintains stable natural gas flow to ensure optimal combustion analysis readings.
• OEM Compatibility: Exact fit for Lochinvar Knight boilers and A.O. Smith commercial water heaters using the 100109960 part number.
• Fail-Safe Design: Engineered with internal shut-off mechanisms to prevent gas bypass during standby mode.
• Quick Installation: Standard NPT threading and plug-and-play electrical connectors reduce downtime on the job site.

Frequently Asked Questions

How do I verify if this gas valve is the correct fit for my unit?
Cross-reference the 100109960 or 194536-5 part number found on your existing valve's nameplate. This valve is primarily used in condensing water heaters and high-efficiency boilers from A.O. Smith and Lochinvar.

Can this valve be converted for use with Liquid Propane (LP)?
This specific model is calibrated for Natural Gas. Conversion to LP requires a manufacturer-approved orifice kit and spring adjustment to meet the higher pressure requirements of propane systems.

What are the signs of a failing 100109960 gas valve?
Common indicators include persistent "No Flame" error codes, failure to open despite receiving 24V signal, or inconsistent manifold gas pressure during high-fire operation.

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.