Four Seasons 39677 A/C Expansion Valve - Rear

Four Seasons 39677 Expansion Valve

Four Seasons 39677 is a block-type A/C expansion valve built for R134A systems and engineered in aluminum for reliable refrigerant control. It is a direct-fit HVAC flow restrictor for select Subaru Crosstrek, Subaru Impreza, and Land Rover Defender 90 applications.

Key Features

• Block-type A/C expansion valve for precise refrigerant metering
• Aluminum construction for HVAC system durability
• Designed for R134A refrigerant systems
• O-ring inlet and outlet connections for secure sealing
• Meets or exceeds OEM requirements
• Style without solenoid
• Super heat setting: -7.000
• 1 tonnage rating

Product Details

Four Seasons Expansion Valve 39677 is part of the brand’s Expansion Valve line, backed by more than 50 years of mobile A/C experience. The product is engineered and tested for dependable operation in automotive HVAC systems, with a focus on accurate refrigerant flow control and long-term service life. This part cross-references UAC (e.g., EX10624C, EX10663C) for the same application.

Compatible With 2022-2023 Land Rover Defender 90, rear; 2018-2023 Subaru Crosstrek; and 2017-2019 Subaru Impreza. Searchers looking for a Subaru Crosstrek A/C expansion valve, Subaru Impreza HVAC expansion valve, or Land Rover Defender 90 rear expansion valve will find this part number 39677 listed for those applications.

Common Symptoms This Part Can Address

• Inconsistent cabin cooling from restricted refrigerant flow
• Warm air from vents when the A/C system is charged
• Erratic evaporator performance caused by metering issues
• Pressure imbalance in the HVAC refrigerant circuit
• Reduced A/C efficiency in R134A systems

Installation Notes and Tips

Verify the liquid and suction line sizes and O-ring styles before installation: liquid inlet No. 6, liquid outlet No. 10, suction inlet No. 12, and suction outlet No. 12. This valve does not include mounting hardware, so reuse or source the correct hardware as needed. Always evacuate and recharge the system according to factory service procedures, and inspect seals and mating surfaces before assembly.

Quality Assurance

Four Seasons engineers and tests its HVAC components for trouble-free operation, drawing on decades of mobile A/C experience. Part number 39677 is built to meet or exceed OEM specifications for the listed applications.