Four Seasons 39640 A/C Expansion Valve - Rear

Reliable A/C Expansion Valve for Audi Q7, Q8, and RS Q8

The Four Seasons Expansion Valve 39640 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for Audi models including the Q7, Q8, Q8 e-tron Sportback, and RS Q8, this aluminum block-type valve ensures precise temperature control and system efficiency.

• Constructed from durable aluminum for long-lasting performance
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with O-ring seals
• Meets or exceeds OEM specifications for reliable fit and function
• Designed without a solenoid for straightforward operation
• Supports a superheat value of 8.000 and 0.800 tonnage capacity

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve line focuses on delivering precise refrigerant flow control components for automotive HVAC systems. This product line emphasizes OEM compatibility and quality materials, such as aluminum construction and O-ring sealing fittings, to maintain system integrity and performance. The 39640 valve is part of this line, offering a block-type design tailored for specific Audi models to ensure proper air conditioning function.

Detailed Product Description

The Four Seasons Expansion Valve 39640 is crafted from aluminum, providing corrosion resistance and durability under varying operating conditions. It is designed for use with R134a refrigerant, the standard for many modern vehicles. The valve features female suction and liquid inlet/outlet fittings with No. 12 and No. 6 thread diameters respectively, all sealed with O-rings to prevent leaks. Its block-type style includes two mounting holes for secure attachment. This valve operates without a solenoid and supports a superheat setting of 8.000, suitable for maintaining optimal cooling performance in Audi Q7, Q8, Q8 e-tron Sportback, and RS Q8 models.

Common Applications and Issues Addressed

• Regulates refrigerant flow to prevent compressor damage
• Maintains proper superheat to optimize A/C cooling efficiency
• Prevents evaporator freezing and system pressure imbalances
• Ensures consistent cabin temperature control
• Replaces faulty or worn expansion valves in Audi HVAC systems

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 39640, ensure compatibility with your Audi model's HVAC system. Use proper tools to avoid damaging the aluminum fittings and O-rings. Verify that the refrigerant type is R134a before installation. Tighten mounting bolts securely using the two provided holes, and inspect all connections for leaks after installation. Professional installation is recommended to maintain system integrity and performance.

Quality Assurance and Warranty

This expansion valve meets or exceeds OEM standards, ensuring reliable fit and function for your Audi Q7, Q8, Q8 e-tron Sportback, and RS Q8. Four Seasons products are manufactured with quality materials and undergo rigorous testing. While specific warranty details are not provided here, Four Seasons typically offers coverage against defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.