Lochinvar & A.O. Smith 100110072 Thermostat

The Lochinvar & A.O. Smith 100110072 is a high-temperature 207F CO M/R limit switch designed for critical safety monitoring in commercial water heaters and boilers. This manual reset (M/R) control features an 8.5-inch insertion probe, ensuring precise thermal sensing within the heat exchanger or tank assembly. As the 100110072 OEM replacement for the legacy LB107-008 limit switch, this component provides exact mechanical compatibility and electrical specifications required for Lochinvar and A.O. Smith equipment. It functions as a fixed-temperature safety cut-out, opening the control circuit if the high-limit threshold is reached to prevent thermal runaway. This HVAC high-limit thermostat is engineered for industrial-grade reliability in high-cycle environments. Technicians should verify probe depth and terminal clearance during installation to ensure the sensor is properly positioned for accurate temperature feedback and system protection.

• OEM Compatibility: Serving as a direct 100110072 replacement for the LB107-008, ensuring a drop-in fit without field modifications.
• Manual Reset Safety: Prevents automatic cycling of faulty equipment by requiring a technician to manually reset the switch after a high-limit event.
• Precise 207°F Setpoint: Specifically calibrated for high-temperature applications requiring a strict 207-degree cut-off.
• Extended Insertion Depth: The 8.5-inch probe allows for deep immersion into the vessel for more accurate core temperature readings.

• Can this be used to replace an automatic reset switch? No, this is a manual reset safety limit. Using it in place of an auto-reset switch will cause the system to stay locked out until manually intervened.
• Which models is the 100110072 compatible with? It is primarily found in Lochinvar Knight and A.O. Smith commercial water heaters that utilize the LB107-008 part number.
• How do I test this limit switch? Use a multimeter to check for continuity across the terminals. If the switch has tripped or the internal bimetal has failed, the circuit will be open.

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.