Four Seasons 38889 A/C Expansion Valve

Reliable A/C Expansion Valve for Buick, Chevrolet, Oldsmobile, and Pontiac

The Four Seasons Expansion Valve 38889 is designed to regulate refrigerant flow in automotive air conditioning systems using R134a refrigerant. This brass TXV (Thermostatic Expansion Valve) ensures precise superheat control, helping maintain optimal A/C performance in select Buick, Chevrolet, Oldsmobile, and Pontiac models.

• Constructed from durable brass for long-lasting use
• Compatible with R134a refrigerant systems
• TXV type valve with a superheat setting of 2.0 for accurate refrigerant flow
• Designed specifically for Buick Achieva, Chevrolet Corsica, Pontiac Grand Am, and Oldsmobile Skylark
• OEM-quality replacement part with part number 38889

About the Four Seasons Expansion Valve Product Line

The Expansion Valve product line from Four Seasons focuses on precise refrigerant flow control within vehicle A/C systems. These valves are engineered to maintain consistent superheat levels, which is critical for efficient cooling and system protection. The 38889 model is part of this line, offering a TXV design that matches factory specifications for select GM vehicles using R134a refrigerant.

Product Details and Specifications

This A/C expansion valve features a brass body that resists corrosion and withstands the demands of automotive HVAC systems. It is designed for use with R134a refrigerant, the standard for many modern vehicles. The TXV type valve controls refrigerant flow based on temperature and pressure, maintaining a superheat of 2.0 to optimize cooling efficiency and prevent compressor damage. The valve is compatible with Buick Achieva, Chevrolet Corsica, Pontiac Grand Am, and Oldsmobile Skylark models, ensuring a proper fit and function.

Common Applications and Issues Addressed

• Regulates refrigerant flow to prevent evaporator freeze-up
• Maintains proper superheat to avoid compressor overheating
• Restores efficient cooling performance in R134a A/C systems
• Replaces faulty or leaking expansion valves causing inconsistent cabin temperatures
• Helps reduce system pressure fluctuations and refrigerant loss

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 38889, ensure the A/C system is properly evacuated and recharged with R134a refrigerant. Verify compatibility with the vehicle make and model before installation. Follow manufacturer torque specifications and handle the valve carefully to avoid damage to the sensing bulb or valve body. It is recommended to replace the receiver/drier or accumulator during A/C system service to maintain system integrity.

Quality Assurance and Warranty

Four Seasons Expansion Valve 38889 meets industry standards for fit and function in specified GM vehicles. The brass construction and TXV design contribute to reliable operation under normal driving conditions. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty against defects in materials and workmanship. Consult product packaging or manufacturer documentation for exact warranty terms.