Lochinvar & A.O. Smith 100109446 Control Valve

The Lochinvar & A.O. Smith 100109446 Natural Gas Control Valve is a critical direct replacement component designed for precision fuel regulation in high-efficiency water heaters and boilers. This gas water heater control valve serves as the current OEM replacement part for the discontinued 9003739105, ensuring seamless mechanical and electrical integration without requiring field modifications. Engineered specifically for natural gas water heater repair, the unit manages the gas valve manifold pressure to maintain consistent thermal output and combustion stability. It features integrated safety shut-off protocols and is compatible with various Lochinvar and A.O. Smith residential units. For technicians performing hot water heater troubleshooting, this valve addresses common failure points such as intermittent pilot outages or erratic temperature swings. The 100109446 is the standardized replacement gas valve for modern atmospheric and power-vented assemblies, providing the reliable millivolt or 24V signal processing required for demanding commercial and residential HVACR applications.

• Direct OEM Compatibility: Specifically engineered as the updated drop-in replacement for the 9003739105 gas valve.
• Enhanced Flow Regulation: Optimized internal diaphragms ensure stable natural gas delivery under varying inlet pressures.
• Corrosion Resistance: Robust housing construction prevents early failure in high-humidity mechanical rooms.
• Simplified Wiring: Features standard terminal connections for efficient field installation and reduced diagnostic time.

Is the 100109446 compatible with Liquid Propane (LP) systems?
No, this specific model is calibrated for Natural Gas only. Utilizing it with LP requires a conversion kit verified by the manufacturer specifications.

Does this valve replace the older 9003739105 model?
Yes, the 100109446 is the official successor and updated version for the 9003739105, maintaining all original mounting and performance footprints.

What are the symptoms of a failing control valve?
Common indicators include an inability to maintain a pilot light, "popping" noises during ignition, or the main burner failing to engage despite a call for heat.

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.