York S1-025-45283-000 Expansion Valve

The York S1-025-45283-000 Expansion Valve is a critical OEM component designed for precise refrigerant metering in 3-ton residential and light commercial evaporator coils. Engineered with a 3/8" x 1/2" ODF connection, this thermostatic expansion valve (TXV) ensures optimal heat transfer by maintaining consistent superheat levels across varying load conditions. The 30-inch capillary tube provides the necessary reach for secure sensing bulb placement on the suction line, which is vital for preventing liquid slugging and compressor hunting. When diagnosing a York 3-ton TXV for restricted flow or bulb failure, technicians will find this OEM replacement expansion valve offers the exact factory specifications required for seamless integration into Johnson Controls and York air handling units. Utilizing a balanced port construction, the S1-025-45283-000 provides stable control of R-410A refrigerant, ensuring the system operates within established pressure parameters to maximize cooling efficiency and evaporator performance.

• Precise Superheat Regulation: Maintains the ideal refrigerant charge to the evaporator, preventing frost-ups and inefficiency.
• OEM Compatibility: Drop-in replacement for York and Luxaire systems, eliminating the need for modifications to the liquid or suction lines.
• Durable ODF Fittings: Clean 3/8" x 1/2" copper connections allow for traditional brazing techniques without the risk of leak paths common in flare fittings.
• Optimized Capillary Length: The 30-inch lead allows for flexible sensing bulb orientation to capture accurate thermal feedback.

What are the symptoms of a failing York S1-025-45283-000?
Common indicators include high suction superheat, low suction pressure, or ice formation on the evaporator coils despite a clean filter and proper airflow.

Is this valve compatible with R-22 systems?
This specific part number is calibrated for high-pressure R-410A applications found in modern York 3-ton units; always verify the refrigerant type on the unit data plate before installation.

Can the sensing bulb be mounted in any orientation?
For best results, the bulb should be mounted on a horizontal section of the suction line at the 4 or 8 o’clock position to ensure it reads the gas temperature rather than oil or liquid sitting at the bottom of the pipe.

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.