Lochinvar & A.O. Smith 100093873 Gas Valve

The Lochinvar & A.O. Smith 100093873 Gas Valve is an OEM Intelli-Vent natural gas control engineered for high-recovery power-vented water heaters. This White Rodgers 37E73A-903 equivalent functions as a centralized combination gas control, integrating a diagnostic microcomputer, silicon nitride ignition control, and a precise immersion thermostat into a single robust housing. Designed strictly for natural gas applications, it features a 1/2-inch NPT inlet and a 1/2-inch inverted flare outlet, supporting a regulation range between 30,000 and 150,000 BTU/hr. The unit utilizes advanced adaptive learning technology to optimize ignitor voltage, significantly reducing wear on the 100093872 hot surface igniter. For streamlined troubleshooting, the 100093873 gas control valve provides 15 specific LED diagnostic codes to identify system malfunctions, such as airflow issues or flame sensing failures, ensuring rapid field diagnostics for service contractors.

• Integrated Intelligence: Consolidates gas regulation, temperature sensing, and ignition sequencing to eliminate external control modules.
• Advanced Diagnostics: Features 6 LED indicators providing 15 distinct error codes for precise HVAC troubleshooting and reduced downtime.
• Enhanced Ignitor Life: Employs Intelli-Ignition technology to manage voltage delivery, protecting the high-performance silicon nitride ignitor.
• Direct Replacement: Serves as the official Lochinvar OEM part for discontinued or failing 316158-000 and 9007601005 control kits.
• Tamper-Resistant Safety: Includes secure temperature adjustment sequences to prevent accidental setpoint changes in residential and commercial settings.

Is the 100093873 compatible with LP (Propane) systems?
No, this specific model is calibrated strictly for natural gas. Installing this on an LP system is a code violation and poses a significant safety risk.

What do the flashing LED lights on the gas valve signify?
The flash patterns correspond to specific Intelli-Vent diagnostic codes, such as pressure switch faults or flame signal loss, allowing a technician to pinpoint the exact failure without extensive manual testing.

Does this kit include the hot surface igniter?
This is the gas control valve assembly only. For a complete system overhaul, it is often paired with the 100093872 silicon nitride igniter.

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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.