This furnace high limit switch features a secondary safety circuit designed to monitor heat exchanger temperatures

Common Questions What does 'Close on Fall' mean for this York switch

When diagnosing pressure switch codes or inducer failures

This motor requires a 5 MFD 370 VAC or 440 VAC run capacitor

this model includes a 500-ohm resistor that enables 4-20 mA proportional control when wired across the input terminals

York 028-12204-000 O-Ring 318820-201 This furnace high limit switchThe York 028 12204 000 O Ring is a critical sealing component engineered specifically for high pressure HVACR applications, particularly within York centrifugal chillers and large scale industrial cooling systems. This EPDM o ring features a 5 7 8 inch inside diameter (ID) designed to maintain airtight integrity under rigorous thermal cycling and high refrigerant pressure. As a direct S1 028 12204 000 replacement part, it ensures a precision fit for