Lochinvar & A.O. Smith 100108899 Limit Switch 328140-751 Always verify the S1-025-29041-006 part

Always verify the S1-025-29041-006 part number against your specific model's data plate

Rotolock Connections: Features 1-3/4" in and 1-1/4" out threaded connections for simplified piping and rapid field replacement

as a factory authorized part

Robust Field Reliability: Built to withstand high-ambient plenum environments with a 350-degree F element limit

What are the signs that my evaporator coil needs replacement

Lochinvar & A.O. Smith 100108899 Limit Switch 328140-751 Always verify the S1-025-29041-006 partThe Lochinvar & A. O. Smith 100108899 Limit Switch is a critical safety component designed for high performance HVAC equipment and water heating systems. Engineered for precision, this L200F manual reset high limit switch monitors internal temperatures and executes a high temperature shutdown if the system exceeds the 200F safety threshold. By interrupting the electrical circuit during an overheat event, it prevents damage to the heat exchanger and