Lochinvar & A.O. Smith 100110742 Temperature Assembly

The Lochinvar & A.O. Smith 100110742 Temperature Assembly is a specialized ECO Outlet Temperature Assembly engineered for precision thermal monitoring in high-efficiency commercial water heaters and boiler systems. As a critical safety and operational component, this OEM replacement part utilizes a dual thermistor configuration to provide real-time resistance-based data to the integrated control board. By monitoring the outlet water temperature at the heat exchanger discharge, the 100110742 ensures the system maintains setpoint accuracy while providing a failsafe Energy Cut-Off (ECO) function to prevent hazardous over-temperature conditions.

Designed for seamless integration with Lochinvar Knight and A.O. Smith commercial units, this assembly features a rugged, corrosion-resistant thermistor well and a high-temperature wire harness. Technicians should verify 10K ohm resistance values at 77°F (25°C) during diagnostics to ensure sensor integrity. Replacing a faulty temperature sensor assembly promptly is essential to prevent erroneous E6 error codes or system lockouts that disrupt facility uptime. This genuine HVAC replacement part is built to the exact specifications required for pressurized, high-performance hydronic loops.

• OEM Compatibility: Exact drop-in replacement for Lochinvar 100110742 and A.O. Smith part numbers, ensuring perfect fitment in commercial heating systems.
• Dual-Function Monitoring: Provides both standard outlet temperature sensing and high-limit ECO protection in a single probe assembly.
• System Stability: Maintains precise modulation control by providing accurate thermal feedback, reducing unnecessary cycling and thermal stress.
• Rugged Construction: Designed with industrial-grade thermistor technology to withstand consistent thermal shock and chemical exposure within the heat exchanger.

• What are the symptoms of a failing 100110742 assembly? Common indicators include erratic digital temperature readouts, "Sensor Open" or "Sensor Short" fault codes on the control panel, and the unit failing to modulate based on demand.
• How do I verify if the ECO thermistor is defective? Perform a resistance test across the wire terminals using a multimeter; compare the Ohms to the manufacturer's temperature-resistance curve to confirm if the sensor has drifted out of tolerance.
• Does this assembly include the mounting gasket? This assembly is typically supplied as the sensor and harness unit; technicians should inspect existing port seals and replace them if signs of degradation are present during the swap.

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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.