Lochinvar & A.O. Smith 100110740 Temperature Control

The Lochinvar & A.O. Smith 100110740 Temperature Control is a critical OEM replacement part designed for high-precision thermal regulation in commercial and residential hydronic systems. Engineered for seamless integration with Lochinvar boilers and A.O. Smith water heaters, this immersion temperature control features a 1/2" NPT brass well connection, ensuring a robust seal and accurate sensing within the heat exchanger or storage tank. It operates within a standard 100 to 140 degree F temperature range, though select configurations support expanded setpoints up to 240°F with a fixed 5°F differential for tight cycling management. This HVAC temperature controller (MPN: 100110740) is the direct successor to legacy part number 9005925205, providing updated internal switching reliability for heavy-duty service. For contractors, this unit ensures energy-efficient water heating by maintaining strict setpoint thresholds, preventing thermal overshoot, and optimizing fuel consumption across diverse mechanical room applications.

Key Benefits

• Direct OEM Compatibility: Engineered specifically for Lochinvar and A.O. Smith equipment, eliminating the fitment issues common with universal aftermarket HVAC parts.
• Precision Thermal Management: Maintains accurate setpoints within a 5°F differential to ensure consistent hot water delivery and system safety.
• Industrial-Grade Construction: Features a durable brass sensing bulb and rugged housing designed to withstand the high-cycle environments of commercial boiler temperature control.
• Standardized Installation: Utilizes a 1/2" NPT connection for fast, reliable threading into existing tank openings or manifolds.

Common Questions

What systems are compatible with the 100110740 control?
This unit is designed primarily for Lochinvar boilers and A.O. Smith commercial water heaters. It is essential to verify your specific model and serial number, as it replaces several legacy parts, including the 9005925205.

What is the adjustable temperature range for this part?
Standard operation for the 100110740 Temperature Control is optimized for 100°F to 140°F, though specific industrial applications may utilize the component for ranges up to 240°F depending on the system's high-limit configuration.

How does this part improve system efficiency?
By utilizing a high-sensitivity brass probe, this aquastat-style control reduces ignition cycling, which limits mechanical wear and ensures the burner only fires when the water temperature drops below the set differential.

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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.