Four Seasons 38889 A/C Expansion Valve

Four Seasons 38889 Expansion Valve for R134A Retrofit

The Four Seasons 38889 expansion valve is a brass TXV built for R134A retrofit A/C systems that use a valve-style flow control setup. It is specified with a 2.0 super heat setting to help regulate refrigerant flow in the HVAC system.

Compatible with 1992-1993 Buick Skylark, 1992-1993 Chevrolet Corsica, 1992-1993 Oldsmobile Achieva, and 1992-1993 Pontiac Grand Am, this expansion valve supports retrofit service on select GM applications. The Four Seasons expansion valve line focuses on precise refrigerant metering for service and replacement work.

Key Features

• Brand: Four Seasons
• Part number: 38889
• Type: TXV expansion valve
• Material/color: Brass
• Refrigerant type: R134A
• Super heat setting: 2.0
• Built for valve-style A/C flow restriction in retrofit applications

Product Details

The Four Seasons 38889 is an A/C expansion valve used to meter refrigerant into the evaporator under R134A retrofit conditions. Its TXV design and 2.0 super heat specification support controlled refrigerant delivery in systems that require a valve-based expansion component. This part cross-references Catco 4682 for the same application.

Common Issues This Part Can Address

• Inconsistent refrigerant metering at the evaporator
• Poor A/C cooling performance after an R134A retrofit
• Valve-related restriction problems in the HVAC circuit
• Expansion valve replacement during A/C service
• Restoration of proper flow control on select GM retrofit systems

Installation Notes and Tips

Verify the vehicle’s A/C system is set up for R134A retrofit service before installation. Confirm the valve style, refrigerant type, and super heat specification match the original service requirements for the application. For 1992-1993 Buick Skylark, Chevrolet Corsica, Oldsmobile Achieva, and Pontiac Grand Am, follow the vehicle service procedure for HVAC component replacement and system evacuation/recharge.

Quality Assurance

Four Seasons is a recognized aftermarket brand for HVAC service parts, and the 38889 expansion valve is built to meet the application-specific requirements listed above. Confirm fitment by year, make, model, and retrofit configuration before ordering.