York S1-025-27747-012 SPST Rollout Switch M/R 260°F

The York S1-025-27747-012 SPST Rollout Switch is a safety device that serves to prevent overheating of HVAC systems. This switch is SPST type, which has a manual reset component in it so that after a problem has been detected in the system, it cannot be cleared automatically but through human intervention. It is intended to work at a heat limit of 260°F and opens when this limit is reached to stop the power supply to the heating equipment to avoid damage. This switch is normally used in furnaces and other heating appliances to measure the heat exchanger or flue zone temperature.