Lochinvar & A.O. Smith 100208176 Limit Switch

The Lochinvar & A.O. Smith 100208176 Limit Switch is a critical safety component engineered to monitor and regulate water temperatures in high-efficiency domestic and commercial heating systems. Calibrated specifically as a 240F High Limit Switch, this device functions as a manual or automatic thermal cutout, interrupting the electrical circuit to the burner or heating elements should the system exceed safe operating parameters. Rated for 240 degrees Fahrenheit, it prevents catastrophic heat exchanger failure and ensures the longevity of your hot water heater parts infrastructure.

This OEM replacement part is cross-compatible and serves as a direct substitute for legacy part numbers HLC2500 and HLC2500K. Designed for a precise fit within Lochinvar and A.O. Smith boiler and water heater assemblies, the switch maintains the integrity of the original system specifications. For contractors performing preventative maintenance or emergency repairs, verifying the Lochinvar part compatibility ensures a seamless restoration of the safety loop. Integrating this 240-degree temperature limit switch is essential for meeting rigorous HVACR safety standards and protecting specialized equipment from extreme thermal stress.

• Direct OEM Alignment: Replaces discontinued HLC2500K and HLC2500 models with 100% mechanical and electrical matching.
• Critical Thermal Cutoff: Provides a secondary layer of protection by shutting down the system at the 240°F threshold to prevent overheating.
• Versatile Application: Engineered for use in a wide range of A.O. Smith and Lochinvar commercial and residential HVAC heating systems.
• Durable Construction: Built to withstand high-ambient boiler room conditions while maintaining calibration accuracy.

What causes a Lochinvar 100208176 high limit switch to trip repeatedly?
Frequent tripping usually indicates underlying system issues such as restricted water flow, excessive mineral buildup in the heat exchanger, or a failing primary thermostat that is failing to regulate temperatures before they reach the 240°F limit.

Is the 100208176 compatible with both gas and electric units?
This switch is utilized across various platforms where a 240F safety limit is required; however, you must verify the specific wiring harness and mounting configuration against your unit's parts manual to ensure a secure fit.

Can I manually reset this switch once it has tripped?
Depending on the specific series of your boiler or water heater, this switch may require a manual reset. Always diagnose the cause of the high-temperature event before resetting to ensure the safety of 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.