Lochinvar & A.O. Smith 100109867 Gas Valve

The Lochinvar & A.O. Smith 100109867 Gas Valve is a critical OEM replacement component designed for high-efficiency liquid propane (LP) water heating systems. Engineered for precise fuel regulation, this 120V gas control valve features a 1/2" inlet/outlet connection and is factory-set for a 10" WC manifold pressure. As a White Rodgers Intellivent gas control, it utilizes advanced microprocessor-based logic for tighter temperature differentials and enhanced system diagnostics via an integrated LED status indicator. This direct replacement gas valve is compatible with select A.O. Smith ProMax and Lochinvar residential models, ensuring seamless integration with existing thermopile and igniter assemblies. When performing a water heater gas valve replacement, this unit provides the necessary 100% safety shutoff and regulated pilot flow required to maintain optimal combustion parameters and system reliability. Professional installation is recommended to verify proper manifold pressure and leak-free operation within the fuel delivery train.

• Intellivent Technology: Integrated electronic control improves sensing accuracy and provides faster heating response times.
• Enhanced Diagnostics: The built-in LED indicator allows technicians to quickly identify gas valve error codes and system faults.
• Direct Fit OEM Part: Eliminates the need for field modifications on compatible Lochinvar and A.O. Smith LP units.
• Integrated Safety: Features a 100% gas shutoff mechanism if the pilot fails, maintaining strict safety standards.
• High-Temp Sensitivity: Calibrated for 160-degree Fahrenheit thermal limits to prevent overheating in the combustion chamber.

How do I troubleshoot an A.O. Smith gas valve with no status light?
If the pilot is lit but the status light is off, verify the thermopile output with a multimeter. A reading below 350mV typically indicates a failing thermopile, while a reading above 350mV with no light often suggests the 100109867 valve needs replacement.

Can this valve be used for Natural Gas conversion?
No, the 100109867 is specifically calibrated for Liquid Propane (LP) with a 10" WC pressure setting. Using this on Natural Gas will result in improper combustion and unsafe operating conditions.

What causes the thermal switch to trip on this unit?
Tripping is usually caused by restricted airflow, such as a clogged flame arrestor or insufficient venting. Always clean the air intake filters before resetting the thermal switch or replacing the valve.

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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.