York S1-025-27747-002 Temp Control and 340AAV furnace models

and 340AAV furnace models

This automatic reset limit control features a 3-inch insertion probe

System Safety: Essential for preventing furnace overheating caused by clogged filters or failed blower motors

If the limit circuit is open

the desiccant chemistry is optimized for use with both POE and mineral oils

York S1-025-27747-002 Temp Control and 340AAV furnace modelsThe York S1 025 27747 002 serves as a high integrity safety component engineered for precise thermal regulation within furnace and air handler assemblies. This manual reset high limit switch is factory calibrated to open at 200 degrees Fahrenheit, functioning as a primary fail safe to interrupt the burner circuit or unit operation if internal temperatures exceed engineered safety thresholds. As a critical HVAC safety control, it prevents heat