York S1-025-29041-006 Limit Switch and T921 series

and T921 series

preventing hunting or sluggish response in HVAC pneumatic control systems

This eliminates the risk of dropping small components into the thermostat assembly or onto the floor during a pneumatic control repair

This precision-machined OEM replacement part replaces obsolete part number B4089345

York S1-025-29041-006 Limit Switch and T921 seriesThe York S1 025 29041 006 Limit Switch is a critical OEM field service component engineered for precise thermal protection in York gas furnaces and air handlers. This automatic temperature limit switch operates within a fixed 170F to 200F range, serving as a primary safety control to prevent heat exchanger damage or unsafe plenum temperatures. Featuring a 3 inch insert probe, it provides accurate sensing of internal airflow temperatures, ensuring the