York S1-024-35619-000 Relay

The York S1-024-35619-000 is an essential 24V on-break relay designed to provide reliable compressor short cycle protection. In the field, we see compressors fail prematurely when they try to restart against high head pressure; this HVAC time delay relay prevents that by enforcing a specific "off" interval after the thermostat call is satisfied. By allowing refrigerant pressures to equalize and oil to return to the sump, it significantly reduces the stress on motor windings and minimizes high inrush current during startup. This solid-state component is a standard York replacement part for RTUs, split systems, and heat pumps, including model H1CE090A25A. Its durable construction is built to withstand the high ambient temperatures of rooftop enclosures, ensuring timing accuracy does not drift. Replacing a chattering or stuck relay with this OEM unit ensures your sequence of operation remains tight and your equipment stays protected from rapid cycling caused by thermostat bounce or power flickers.

• Prevents rapid restarts to protect expensive compressor motors from mechanical seizure.
• Ensures refrigerant head pressure equalizes before the next cooling cycle begins.
• Heavy-duty solid-state timing circuit resists electrical noise and temperature-induced drift.
• Direct OEM fit for York and Johnson Controls equipment, eliminating mounting or wiring guesswork.
• Critical for maintaining proper system sequencing in commercial RTUs and residential heat pumps.

What is the difference between on-delay and on-break functionality?
An on-break relay (off-delay) begins its timing cycle the moment the control signal is lost, preventing the equipment from restarting immediately. This is the primary defense against short-cycling in refrigeration circuits.

How do I know if my current time delay relay has failed?
Technicians should look for a "clicking" sound without contact engagement or a compressor that refuses to start even after the typical delay period has passed. Use a multimeter to verify 24V at the coil and check for continuity across the load terminals.

Can this relay be used in universal 24VAC control applications?
While engineered as a specialized York component, its 24V logic makes it compatible with most standard HVAC control strings requiring an on-break delay to protect compressors or blower motors.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.