Four Seasons 39308 A/C Expansion Valve

Four Seasons 39308 Expansion Valve

The Four Seasons 39308 expansion valve is a block-type A/C flow restrictor built for R134A systems. It is an aluminum, OE-style replacement that meets or exceeds OEM requirements and is specified for 1-ton applications with an 8.0 superheat setting.

Compatible With 2005 Chevrolet Equinox and 2005 Saturn Vue, this Four Seasons Expansion Valve 39308 also fits 2006-2007 Saturn Vue applications. It is a direct-fit HVAC service part for vehicles using the listed hose and sensor-mounting configurations.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39308
• Block-type A/C expansion valve for R134A refrigerant
• Aluminum construction and aluminum finish
• OE-style replacement that meets or exceeds OEM specifications
• Female suction and liquid connections with no threaded inlet/outlet design
• Specified superheat: 8.0
• Style: w/o solenoid
• Fits 2005 Chevrolet Equinox, N/A, with single stud for hoses and without sensor mounting port
• Fits 2005 Saturn Vue, N/A, with single stud for hoses and without sensor mounting port
• Fits 2006-2007 Saturn Vue, N/A

Detailed Description

The Four Seasons 39308 expansion valve regulates refrigerant flow into the evaporator so the A/C system can maintain proper cooling performance. Its block-type design, aluminum body, and R134A calibration make it a practical replacement for service work on the listed Chevrolet and Saturn applications. If you are replacing a worn or restricted valve on a 2005 Chevrolet Equinox or Saturn Vue, or on a 2006-2007 Saturn Vue, this part number 39308 matches the documented fitment and connection style.

This part cross-references UAC EX10312C for the same application.

What It Helps Address

• Weak cabin cooling caused by restricted refrigerant metering
• Erratic evaporator performance from a worn expansion valve
• Incorrect refrigerant flow in R134A A/C systems
• Service replacement needs on Equinox and Vue HVAC repairs
• Leak-prone or degraded valve connections at the A/C block interface

Installation Notes and Tips

Verify the vehicle’s hose layout, sensor mounting port configuration, and connection sizes before installation. Replace sealing components as needed during A/C service, and evacuate and recharge the system according to the vehicle manufacturer’s procedures after the repair. Confirm the system is set up for R134A refrigerant before installing part number 39308.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements. The part is built as an OE-style HVAC replacement for the specified applications and is supported by the brand’s expansion valve product line.