York S1-025-33379-003 Reversing Valve

The York S1-025-33379-003 Reversing Valve is a critical 4-way pilot-operated component engineered for high-performance heat pump applications. This OEM York replacement part features a factory-installed 24V 4W solenoid coil, ensuring precise control over refrigerant flow direction to transition seamlessly between heating and cooling cycles. Designed for rigorous duty cycles, it maintains system pressure differentials efficiently, reducing mechanical stress on the compressor during mode shifts. Heat pump reversing valve troubleshooting often points to coil failure or internal slide-valve sticking; this assembly addresses both possibilities by providing a complete, calibrated solution with a pre-wired reversing valve wiring harness.

For contractors performing a York heat pump repair, this valve offers drop-in compatibility for specific residential and light commercial units, including model series like the BP240E54S4AAA1. The low-wattage 24V coil minimizes electrical load on the transformer while providing the magnetic force necessary to shift the internal slide even under high-head pressure conditions. When searching for a reversing valve with 24V coil, technicians prioritize leak-proof brazed connections and reliable electrical termination, both of which are standard on this genuine York assembly. Integrating this part restores optimal HVAC refrigerant flow control and ensures the equipment operates within its engineered thermal parameters.

• Genuine York S1-025-33379-003 construction ensures exact fit and factory-spec pressure ratings.
• Includes a 24V 4W coil and integrated harness for faster field installation and reduced labor time.
• Hard-seat design provides a superior seal to prevent refrigerant bypass and maintain system EER/HSPF.
• Robust 4-way pilot operation facilitates smooth shifting in extreme ambient temperatures.

How do I confirm if the reversing valve solenoid is energized?
Use a multimeter to verify 24V AC at the harness leads. If voltage is present but the valve fails to shift, check for a magnetic field using a solenoid magnet tool or a screwdriver to determine if the coil is functional before suspecting a mechanical blockage.

Can this valve be used with R-410A systems?
Yes, this OEM valve is designed to handle the higher operating pressures associated with R-410A refrigerant, provided the model number matches your specific unit's parts list.

What causes a reversing valve to get stuck in one mode?
Common causes include a burnt-out 24V coil, physical debris in the refrigerant lines, or a lack of sufficient pressure differential to move the internal slide-valve assembly.

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.