and AF-3 airflow switch series

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

specifically fitting several medium and large frame displacements

this model serves as a field-ready replacement for the 620858R

Field technicians rely on its modular design and robust relay construction for consistent staging control in harsh HVACR environments

York S1-025-29041-001 Limit Switch and AF-3 airflow switch seriesThe 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