Description
The York S1-02538901000 Limit Switch/Thermostat is a control part used to monitor temperature conditions inside heating or air handling equipment. It operates as a single-pole single-throw switch that opens at approximately 55 °C to interrupt the control circuit when excessive heat is detected and closes again when the temperature drops to around 45 °C, restoring normal operation. Installed in HVAC systems such as air handlers and packaged units, it support to prevent overheating of internal components like heat exchangers and blower sections. This ensures safe operating limits, protects equipment from thermal stress, and supports reliable system cycling in heating and cooling applications.
