York S1-025-27155-000 Expansion Valve 318172-701 Ensure the bulb end is

Ensure the bulb end is securely fixed to the evaporator surface or within the designated airflow path for accurate thermal transfer

If the suction is adequate but the SPST switch remains open

Flexible Installation: Includes inserts and scaling for both horizontal and vertical mounting

It features a built-in auxiliary switch for position signaling and feedback

York S1-025-27155-000 Expansion Valve 318172-701 Ensure the bulb end isThe York S1 025 27155 000 is an OEM thermal expansion valve (TXV) engineered to maintain precise refrigerant metering for residential and light commercial evaporator coils. Specifically designed for R 410A refrigeration systems, this valve utilizes a 3 8" ODM inlet and a 3 8" ODF outlet to ensure reliable sweat connections within the liquid line. As a veteran technician knows, accurate superheat control is critical for preventing compressor slugging