York S1-025-41321-000 Auto Limit Switch 150°F Open 110°F Close

The York S1-025-41321-000 Auto Limit Switch is a temperature-sensitive safety control used to regulate the amount of heat in heating equipment. It closes the circuit at about 150°F and opens again at about 110°F as temperatures resume normal levels when used in furnaces and packaged HVAC systems. The switch is installed in a place where the temperature should be measured and connected to the control circuit. This automatic limit switch allows the protection of components, aids in correct cycling, and also adds to the reliable work of the system by responding to increasing and decreasing temperatures.