York S1-025-27747-017 Rollout Switch 320788-703 the contacts remain open to

the contacts remain open to prevent the ignition sequence if the required static pressure isn't met

reducing the risk of seat leakage or "simmering" near the set limit

and HCG models

175 lb-in spring return direct coupled actuator engineered for precise control of dampers and quarter-turn valves in commercial HVACR systems

and oil-free control air to prevent internal diaphragm contamination and ensure long-term reliability in the pneumatic circuit

York S1-025-27747-017 Rollout Switch 320788-703 the contacts remain open toThe York S1 025 27747 017 Rollout Switch is a critical OEM replacement part designed for high limit temperature monitoring in York, Coleman, and Luxaire gas furnaces. This rollout switch is precision calibrated to trip at 350F, effectively breaking the 24V safety circuit to the gas valve if flame rollout or heat exchanger compromise occurs. As a manual reset rollout switch, it requires a physical inspection of the combustion area by a technician