York S1-025-33451-000 Pressure Control

The York S1-025-33451-000 Pressure Control is a critical safety component designed for precise refrigerant management in residential and light commercial HVAC systems. Operating as a low pressure cutout switch, this control features factory-set trip points of 23 PSI (open) and 38 PSI (close). This specific 23/38 O/C configuration is essential for protecting the hermetic compressor from low suction pressure conditions, which can lead to oil migration issues or evaporator coil freeze-ups. As a genuine OEM York replacement part, it ensures direct mechanical compatibility with existing refrigeration lines, maintaining the integrity of the system's electrical safety string. The encapsulated design provides superior protection against moisture and vibration, common failure points in standard pressure switches. For technicians performing HVAC system troubleshooting, replacing a failed switch with this calibrated OEM unit ensures the system maintains precise operating parameters without the need for field adjustments or secondary calibration during installation.

• Precision Calibration: Factory-set 23 PSI open and 38 PSI close points ensure consistent refrigerant pressure monitoring.
• System Protection: Effectively prevents compressor damage during low-charge scenarios or restricted airflow conditions.
• OEM Reliability: Direct replacement for Johnson Controls and York S1-025-33451-000, ensuring exact fitment and electrical ratings.
• Durable Construction: Built to withstand high-cycle environments and extreme temperature fluctuations common in condensing units.

What causes a low pressure switch to trip frequently?
Repeated tripping usually indicates a low refrigerant charge, a restricted thermal expansion valve (TXV), or a severely clogged air filter. If the York pressure switch shows continuity when pressure is above 38 PSI, the switch is functioning, and the system charge should be recovery-tested.

Can this switch be field-adjusted?
No, the S1-025-33451-000 is a fixed, non-adjustable control. If your application requires different setpoints, you must select the specific OEM part number matched to the system's technical data sheet to ensure proper compressor safety.

Is this compatible with R-410A systems?
Yes, this control is designed to handle the pressures associated with modern refrigerants, though it is specifically calibrated for low-side protection. Always verify the circuit's operating range against the 23/38 PSI setpoints before installation.

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.