Lochinvar & A.O. Smith 100327113 Thermostat

The Lochinvar & A.O. Smith 100327113 Thermostat is a critical surface thermostat engineered for high-accuracy temperature regulation in commercial and residential water heating systems. Effectively serving as the direct replacement for 100170479 (also identified as old part number TST1121), this component ensures seamless HVAC system compatibility across various Lochinvar DVN and DVL series models manufactured from July 1997 to the present. As a genuine OEM replacement part, it is designed to restore factory-spec thermal efficiency by providing a reliable signal for burner engagement based on real-time water temperature differentials. Its robust construction is built to withstand the rigorous cycling environments found in Lochinvar water heaters and A.O. Smith units, maintaining a stable adjustable temperature range to prevent erratic system behavior. For technicians, this 100327113 water heater thermostat offers a straightforward drop-in solution to resolve common high-limit trips and sensing failures, ensuring the heating system operates within its intended safety and performance parameters.

• Direct OEM Interchange: Replaces the discontinued 100170479 and TST1121 parts without the need for additional retrofitting or mounting hardware.
• Precision Sensing: Utilizes high-sensitivity surface contact to provide accurate temperature feedback, preventing overheating and improving fuel economy.
• Broad Compatibility: Specifically designed for Lochinvar DVN and DVL (41, 51, 52, 65, 76) units, ensuring precise fitment for serial sequences starting with PG.
• Enhanced System Longevity: Helps maintain consistent operating temperatures, reducing mechanical stress on the primary heating assembly and gas valves.

• Is the 100327113 the correct replacement for my older Lochinvar model? Yes, this part is the manufacturer-designated successor to the 100170479 and is backward compatible with specified series dating back to 1997.
• Will this thermostat fit A.O. Smith commercial water heaters? Since Lochinvar and A.O. Smith share specific component platforms, this part is compatible with select A.O. Smith units where part 100327113 is listed in the technical manual.
• Does this include the necessary mounting bracket? This component is typically designed for direct surface mounting; always check your existing bracket for wear before finalizing the installation.

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.