Lochinvar & A.O. Smith 100108952 Thermostat

High-performance water heater maintenance requires the Lochinvar & A.O. Smith 100108952 Lower Thermostat, a professional-grade surface-mount temperature control engineered for precision in commercial electric water heaters. This OEM water heater side-mount thermostat is specifically designed as a lower thermostat replacement for high-demand systems like the A.O. Smith model DRE 52. It features an integrated Energy Cut-Off (ECO) safety mechanism, designed to disrupt power to the heating elements if tank temperatures exceed safe operational parameters, preventing catastrophic equipment failure. The inclusion of the protective terminal cover ensures compliance with safety standards and shields electrical connections from environmental debris and accidental contact during routine maintenance. For contractors servicing Lochinvar or A.O. Smith boiler systems, this 100108952 thermostat with ECO provides consistent thermal regulation to maintain critical Btu/hr recovery rates and maximize the energy efficiency of the storage tank.

• Enhanced Safety: Includes a factory-calibrated Energy Cut-Off (ECO) high-limit switch to mitigate overheating risks.
• OEM Compatibility: Exact Lochinvar & A.O. Smith replacement part for guaranteed fit and proper alignment with heating elements.
• Terminal Protection: Supplied with a durable terminal cover to ensure secure electrical insulation.
• Precise Control: Maintains accurate water temperature setpoints for consistent hot water delivery in commercial applications.

How do I know if the ECO has tripped on the 100108952 thermostat?
A tripped ECO typically results in no power reaching the lower heating element. Check for continuity across the reset button; if the system has overheated, the manual reset must be depressed after the water has cooled to resume operation.

Is this thermostat compatible with residential AOSmith units?
The 100108952 is primarily engineered for commercial electric models such as the DRE 52. Always verify your specific model and serial number to ensure the voltage and mounting style match your existing lower thermostat configuration.

Why is a lower thermostat different from an upper thermostat?
In a dual-element system, the lower thermostat cycles more frequently to maintain the overall tank temperature once the upper portion is heated. This part is designed to work in tandem with the upper control to ensure balanced thermal stratification.

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.