Four Seasons 39564 A/C Expansion Valve

Four Seasons 39564 Expansion Valve Overview

The Four Seasons 39564 expansion valve is a block-type A/C flow restrictor built for R134A systems. It uses an aluminum body with captured O-ring connections for the liquid and suction lines, making it a direct-fit service part for a wide range of Audi HVAC applications.

For drivers searching for an Audi A4 expansion valve, Audi S5 expansion valve, or Audi Q5 A/C expansion valve, this Four Seasons Expansion Valve line part number 39564 provides an OE-style replacement that meets or exceeds OEM requirements.

Key Features

• Four Seasons Expansion Valve line, part number 39564
• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Captured O-ring liquid and suction fittings
• Female liquid and suction inlet/outlet connections
• 2 mounting holes for secure installation
• Meets or exceeds OEM specifications
• Designed for 1.5-ton HVAC applications

Product Details

This expansion valve regulates refrigerant flow into the evaporator so the A/C system can maintain proper pressure and cooling performance. The Four Seasons 39564 is a w/o solenoid design with a -6.000 super heat setting, built for R134A systems that use No. 6 liquid ports and No. 12 suction ports. Its captured O-ring style helps support a clean seal at the line connections, while the aluminum construction matches common OE service requirements.

Fitment coverage includes Audi RS5, RS5 Sportback, RS6 Avant, RS7 Sportback, S4, S5, S5 Sportback, S6, S7 Sportback, SQ5, SQ5 Sportback, Q8 e-tron, e-tron Quattro, e-tron Sportback, A4, A4 allroad, A4 Quattro, A5, A5 Quattro, A5 Sportback, A6, A6 allroad, A6 Quattro, Q2, Q2 Quattro, Q5, and Q5 PHEV applications across model years 2017-2025 where listed.

This part cross-references Audi OE and aftermarket numbers such as 8W0820679 and EX10617C for the same application.

Common A/C Problems This Part Can Address

• Weak cabin cooling caused by incorrect refrigerant metering
• Erratic evaporator performance from a worn internal valve
• Pressure imbalance in an R134A A/C system
• Refrigerant flow restriction issues at the expansion valve
• Service replacement needs after A/C system repair

Installation Notes and Tips

Verify the vehicle uses an R134A system and confirm the liquid and suction port sizes before installation. Inspect the O-ring sealing surfaces, replace damaged seals as needed, and check the line alignment so the captured O-ring connections seat correctly. After installation, evacuate and recharge the system according to factory service procedures and confirm proper vent temperature and compressor cycling.

Quality Assurance

Four Seasons manufactures HVAC service parts to OE-style standards, and this 39564 expansion valve is listed as meeting or exceeding OEM requirements. It is a direct replacement choice for Audi A4, Audi S5, Audi Q5, and related models that use the specified block-type R134A expansion valve design.