Four Seasons 39666 A/C Expansion Valve - Front

Overview of Four Seasons Expansion Valve 39666

The Four Seasons Expansion Valve 39666 is designed specifically for Land Rover vehicles, including Defender 90, Defender 110, Defender 130, Discovery, and Discovery Sport models. This A/C expansion valve ensures precise refrigerant flow control for optimal air conditioning performance using R134a refrigerant.

• Constructed from durable aluminum material
• Block type design with two mounting holes for secure installation
• Compatible with R134a refrigerant systems
• Female suction and liquid inlet/outlet fittings with O-ring sealing
• Meets or exceeds OEM specifications
• Designed without a solenoid for reliable operation
• Supports 1.5 tonnage A/C systems with 2.0 superheat setting

Four Seasons Expansion Valve Product Line Details

The Expansion Valve product line by Four Seasons focuses on delivering reliable A/C flow restrictors that maintain proper refrigerant metering and system efficiency. This line includes block type valves engineered to meet OEM standards, ensuring compatibility and performance for specific vehicle applications such as Land Rover models. The 39666 valve is part of this line, providing a precise fit and function without solenoid components.

Technical Description and Features

The Four Seasons 39666 expansion valve is made from aluminum, offering corrosion resistance and durability in automotive HVAC systems. It features female fittings on both suction and liquid inlet/outlet ports, all sealed with O-rings to prevent leaks. The valve uses No. 10 thread diameters for suction fittings and No. 6 and No. 10 for liquid fittings, ensuring proper connection to the vehicle’s A/C lines. Its block type design includes two mounting holes for secure attachment. The valve is calibrated for a 2.0 superheat setting and supports 1.5 tonnage systems, making it suitable for Land Rover Defender and Discovery series vehicles running R134a refrigerant.

Common Applications and Problem Solving

• Restores proper refrigerant flow in Land Rover Defender 90, 110, 130, Discovery, and Discovery Sport A/C systems
• Resolves inconsistent cabin cooling due to faulty or clogged expansion valves
• Prevents compressor damage caused by improper refrigerant metering
• Eliminates refrigerant leaks with O-ring sealed female fittings
• Addresses issues related to superheat imbalance in R134a systems

Installation Notes and Tips

• Ensure compatibility with Land Rover Defender and Discovery models before installation
• Use proper tools to avoid damaging the aluminum valve body or fittings
• Replace O-rings during installation to maintain leak-free connections
• Verify system pressure and superheat settings after installation for optimal performance
• Follow vehicle manufacturer guidelines for A/C system service and refrigerant handling

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39666 meets or exceeds OEM specifications, ensuring reliable performance and fitment for Land Rover vehicles. Manufactured with high-quality aluminum and precision engineering, this valve is designed for durability and consistent operation. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.