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

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

This beige metal thermostat guard features a robust heavy-duty steel enclosure with a 22-gauge frame and an 8-gauge cover

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 Common Questions What does 'CloseThe 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