Four Seasons 38609 A/C Expansion Valve

Four Seasons 38609 Expansion Valve

Four Seasons 38609 is a brass TXV A/C expansion valve for R134A systems. It regulates refrigerant flow into the evaporator and helps maintain the correct superheat setting for stable HVAC performance in compatible Saab, Volkswagen, and Porsche applications.

Key Features

• Brand: Four Seasons Expansion Valve line
• Part number: 38609
• Brass construction
• TXV design for R134A refrigerant systems
• Super heat setting: 8.0
• Compatible with select Porsche 911, Porsche 924, Saab 900, Saab 9000, and Volkswagen Cabriolet applications

Product Details

This Four Seasons expansion valve is built for A/C systems that require precise refrigerant metering at the evaporator inlet. The brass body and TXV design support consistent flow control in R134A-equipped vehicles, helping the HVAC system maintain proper cooling balance. Four Seasons 38609 is listed for applications including 1978-1983 Porsche 911 with O-ring fittings, 1977-1982 Porsche 924, 1984-1992 Porsche 911, 1987-1988 Porsche 924, 1979-1993 Saab 900, 1986-1990 Saab 9000, and 1985-1993 Volkswagen Cabriolet. This part cross-references Bosch 17208 for the same application.

Common Issues This Part Can Address

• Uneven cabin cooling caused by incorrect refrigerant metering
• Evaporator performance problems related to a worn TXV
• A/C temperature fluctuations in R134A systems
• Reduced cooling efficiency from a restricted or sticking expansion valve
• HVAC control issues in select Porsche 911, Porsche 924, Saab 900, Saab 9000, and Volkswagen Cabriolet models

Installation Notes and Tips

Verify refrigerant type, system configuration, and OE-style fitment before installation. Match the valve to the vehicle’s A/C layout and confirm the correct fittings and superheat specification for the application. For best results, inspect the surrounding A/C components for contamination or restriction before replacing the valve.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning systems, and this expansion valve is specified with a brass body, TXV operation, and an 8.0 superheat setting for the listed applications.