this auxiliary interlock switch delivers the mechanical precision required by veteran technicians and electrical contractors

ensures the manifold pressure is properly regulated for propane’s higher BTU content

or an audible humming sound from the outdoor unit without ignition

As a Type II 10K thermistor

York S1-025-29041-001 Limit Switch this auxiliary interlock switch deliversThe York S1 025 29041 001 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in high efficiency furnace and air handling units. Specifically designed as an Auto Reset Limit Switch, it features a 3 inch probe insertion to accurately gauge plenum temperatures. This HVAC high limit control is calibrated to trigger at a high end threshold of 220F and reset at 190F, preventing heat exchanger damage and ensuring safe