York S1-025-42731-000 Reversing Valve

The York S1-025-42731-000 Reversing Valve is a critical 4-way solenoid-operated valve designed for precise refrigerant flow reversal in residential and commercial heat pump systems. Engineered to meet exact OEM specifications, this 24V reversing valve features 1/2" x 3/4" ODF (Outside Diameter Female) sweat connections, ensuring a gas-tight fit and reliable brazing during installation. This component is the primary mechanism for switching a system between heating and cooling modes by redirecting high-pressure discharge gas. As a high-grade HVAC replacement part, it is the direct superseding manufacturer solution for legacy models S1-025-35310-003 and S1-025-32707-002. When diagnosing heat pump reversing valve symptoms like "stuck in cooling" or "bypass leaks," utilizing this genuine York component ensures restored system efficiency and proper pressure differential management across the compressor.

• Direct OEM Compatibility: Eliminates the need for piping re-configurations often required by universal aftermarket valves.
• Standardized Electrical Specs: Operates on a standard 24VAC coil, integrating seamlessly with existing thermostat wiring and control boards.
• Durable Construction: Built to withstand high-side discharge temperatures and frequent cycling without pilot valve failure.
• Verified Supersession: Formally replaces S1-025-35310-003 and S1-025-32707-002, ensuring the latest internal valve port design.

What are the connection sizes for this valve?
This unit utilizes a 1/2-inch suction line and a 3/4-inch discharge/condenser line connection, both featuring ODF sweat fittings for standard brazing procedures.

Will this valve work in systems using R-410A or R-22?
Yes, the S1-025-42731-000 is designed to handle the pressure requirements of modern refrigerants, provided the system capacity aligns with the valve's tonnage rating.

Does this include the solenoid coil?
Contractors should verify the existing coil’s condition; while designed for 24V operation, it is best practice to inspect the coil for cracks or continuity issues when replacing the valve body.

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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.