Technicians should check for continuity across the terminals when the coil temperature is below the switch's closing setpoint

The heat sequencer relay provides a reliable "on" timing of 10-30 seconds and an "off" delay of 30-60 seconds across all three poles

Close-off pressure is actuator-dependent

Corrosion Resistance: Heavy-duty bronze body resists aggressive water conditions and ensures long-term structural integrity

Technicians should use a manometer to verify the inducer is pulling at least -

York S1-025-43269-000 Control 319847-401 Technicians should check for continuityThe York S1 025 43269 000 Control is a high limit temperature control switch designed for precision thermal monitoring in York, Luxaire, and Coleman HVAC systems. Engineered for reliability in high heat environments, this limit switch features a fixed 245F open and 215F close setting, providing essential overheat protection to prevent heat exchanger damage or unsafe operating conditions. As an OEM York replacement part, it ensures direct compatibility