York 024-27521-000 Power Relay

Ensuring reliable switching in industrial and commercial HVAC systems, the York 024-27521-000 Power Relay is a heavy-duty OEM replacement part designed for high-voltage isolation and contactor control. This double-pole power relay is typically utilized in York and Johnson Controls rooftop units and air handlers to manage condenser fan motors and compressor circuits. Rated for up to 25 Amps and 250 VAC, this component provides a 1000V isolation barrier between control logic and high-power loads. The DPST pulse relay configuration allows for efficient energy management with a compact footprint, featuring standard 1/4-inch quick-connect terminals for rapid field installation. When your condenser fan fails to engage or the condensing unit remains idle despite a call for cooling, this York HVAC relay is the primary diagnostic suspect. Built to original equipment manufacturer specifications, it replaces previous iterations of the S1-024-27521-000 series, ensuring the electrical integrity of the control circuit remains within factory tolerances.

• Maximum Load Support: Rated for 25 Amp, 2-pole applications, making it suitable for high-draw AHU and condenser components.
• OEM Precision: Genuine S1-024-27521-000 specifications ensure exact terminal alignment and coil resistance for York systems.
• Voltage Versatility: Capable of switching 110/120 VAC or 240 VAC loads with superior arc suppression.
• Durable Housing: Features a high-quality molded case designed to withstand the vibration and thermal cycling common in outdoor units.

Is this relay compatible with 24V control circuits?
Yes, while it switches high-voltage loads, the coil is designed to interface with standard 24VAC HVAC control boards typically found in York commercial units.

Can I use this as a substitute for a generic 2-pole contactor?
While functionally similar in some circuits, this power relay features a specific mounting footprint and terminal layout meant for York control panels. It is recommended to use the S1-024-35664-000 or similar if a different amp rating is specified by the model data plate.

What symptoms indicate this part has failed?
Common failure points include internal coil burnout or pitted contacts, leading to a "chattering" sound or a complete failure of the condenser fan motor to initiate during the cooling cycle.

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.