Four Seasons 39314 A/C Expansion Valve - Rear

Four Seasons 39314 Expansion Valve

The Four Seasons 39314 expansion valve is a block-type A/C flow restrictor for rear HVAC systems using R134A refrigerant. Built from aluminum and engineered to meet or exceed OEM requirements, it is a direct-fit service part for select Cadillac, Chevrolet, and GMC rear air conditioning applications.

For rear A/C service on vehicles such as the Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon, this expansion valve helps restore proper refrigerant metering at the evaporator. The Four Seasons Expansion Valve line is focused on OE-style replacement parts for accurate system control and dependable fitment.

Key Features

• Part number: 39314
• Block-type A/C expansion valve
• Aluminum construction with aluminum finish
• Designed for R134A refrigerant systems
• Rear HVAC application
• Female suction and liquid fittings with sealing washer connections
• Mounting hole quantity: 2
• Meets or exceeds OEM specifications
• Style: w/o solenoid
• Super heat setting: 5.500
• Fits rear A/C service applications on Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon

Detailed Description

Four Seasons 39314 is an A/C expansion valve for rear climate control systems that require precise refrigerant flow regulation. It uses female inlet and outlet connections with sealing washer interfaces, including suction inlet and outlet sizes of No. 10 and No. 12, plus liquid inlet and outlet sizes of No. 6 and No. 8. This configuration supports proper refrigerant control in rear evaporator circuits on 2007-2014 Chevrolet Tahoe, 2007-2014 GMC Yukon, and select Cadillac Escalade, Escalade ESV, and Escalade EXT models. This part cross-references UAC EX10293C for the same application.

Common Problems It Can Address

• Rear A/C vent air that is not cooling properly
• Irregular refrigerant metering at the evaporator
• Loss of rear cabin temperature control
• System performance issues after A/C component replacement
• Expansion valve wear or restriction in R134A systems

Installation Notes and Tips

Verify the vehicle uses a rear HVAC setup and confirm the fitting style, thread sizes, and refrigerant type before installation. Replace sealing washers as required during service, and evacuate and recharge the system according to factory specifications after the valve is installed. Confirm the super heat setting and mounting-hole alignment match the original component on the vehicle.

Quality Assurance

Four Seasons 39314 is built to meet or exceed OEM specifications for the listed applications. The Four Seasons Expansion Valve product line is used for OE-style HVAC service parts with application-specific fitment and material selection.