York S1-025-20709-000 Pressure Switch

The York S1-025-20709-000 Pressure Switch is a factory-calibrated OEM high-pressure limit designed for precise refrigerant circuit monitoring in York, Coleman, and Luxaire equipment. As a critical safety component, this high pressure cutout switch is engineered to open the control circuit at 227 PSI and automatically reset when pressure stabilizes at 170 PSI. For contractors managing HVAC service and repair, this switch ensures the compressor is protected from excessive head pressure caused by condenser coil fouling or fan motor failure. Utilizing a York replacement part maintains the integrity of the original system design, providing a reliable normally-closed contact configuration. This HVAC safety control is built to withstand the rigors of high-cycle applications and vibration levels common in residential heat pumps and air conditioners. Integrating this specific mechanical pressure switch into your diagnostics routine allows for accurate system monitoring and prevents catastrophic component failure during high-ambient operation.

• OEM Precision: Factory set at 227 PSI (Open) and 170 PSI (Close) to match original manufacturer specifications for reliable safety.
• System Protection: Acts as a primary fail-safe against high-side pressure conditions that could lead to costly compressor damage.
• Durable Construction: Engineered to resist moisture ingress and vibration-induced fatigue in demanding outdoor condensing environments.
• Direct Compatibility: Drop-in replacement for various York residential units, ensuring the system remains within UL design parameters.

What causes this switch to trip in a York system? High discharge pressure typically triggers this switch, often resulting from a dirty condenser coil, a failing outdoor fan motor, or a refrigerant overcharge. Always verify subcooling and superheat values if the switch opens during operation.

How do I verify the S1-025-20709-000 is functioning properly? Use a multimeter to check for continuity across the terminals. Since this is a normally-closed switch, it should show continuity below the 227 PSI trip point. If the circuit remains open when system pressure is at 170 PSI, the internal diaphragm or contacts may have failed.

Is this switch compatible with both R-22 and R-410A? While the switch is rated for these specific pressures, you must confirm that the 227/170 PSI thresholds align with the high-side safety requirements listed in the specific equipment’s technical service manual.

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.