York S1-025-17620-705 Pressure Switch

The York S1-025-17620-705 is a critical HVAC low pressure switch engineered as an OEM replacement part for York, Coleman, and Luxaire condensing units. As a veteren-grade refrigerant pressure control, this encapsulated switch monitors the suction line to prevent compressor slugging and catastrophic failure due to loss of charge or restricted metering devices. This specific 38/23# pressure switch is calibrated to open at 23 PSI and close at 38 PSI, an industry-standard setpoint for R-410A systems designed to maintain operational integrity under low-load conditions. The York S1-025-17620-705 features dual-lead electrical connectors and a 1/4-inch flare fitting for secure, leak-proof integration into the refrigerant circuit. Whether you are troubleshooting a short-cycling compressor or a complete unit lockout, this switch provides the millisecond response time required to protect high-cost components from thermal overload. Reliable and rugged, it remains the standard choice for contractors looking to restore factory-spec low pressure safety limits in residential and light commercial split systems.

Key Benefits:

• Precision Calibration: Optimized with a 23 PSI cutout and 38 PSI cut-in to ensure the compressor only runs within safe refrigerant density levels.
• Direct OEM Compatibility: Replaces York part number S1-025-17620-705 and cross-referenced part 208Z33 without modification.
• Durable Encapsulation: Built to withstand moisture and vibration common in outdoor condensing units and heat pump applications.
• System Protection: Acts as a primary safety to prevent air and moisture from being drawn into the system during a leak.

Common Questions:

Why is my unit locking out on a low pressure code?
Lockouts typically occur because the refrigerant pressure has dropped below 23 PSI. This can be caused by a leak, a restricted filter drier, or a malfunctioning thermal expansion valve (TXV). Always verify actual line pressures with a manifold gauge set before assuming the pressure switch is faulty.

Does this switch work with R-22 or R-410A?
The S1-025-17620-705 is primarily utilized in R-410A systems where the 38/23 PSI range aligns with the specific safety parameters for that refrigerant's pressure-temperature profile.

Can this pressure switch be bypassed during testing?
Technicians may temporarily jump the terminals to diagnose a faulty switch, but the unit must never be left in operation without a functional refrigerant pressure control as it risks permanent compressor damage.

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.