Four Seasons 39426 A/C Expansion Valve - Front

Reliable A/C Expansion Valve for Nissan and Infiniti Vehicles

The Four Seasons Expansion Valve 39426 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for select Nissan and Infiniti models, this aluminum block-type valve ensures precise temperature control and efficient A/C performance.

• Constructed from durable aluminum for long-lasting use
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with captured o-ring seals
• Meets or exceeds OEM specifications for reliable fit and function

Detailed Features and Specifications

This Four Seasons Expansion Valve 39426 features a block-type design made from aluminum, providing corrosion resistance and durability. It is designed for use with R134a refrigerant, common in many Nissan and Infiniti A/C systems. The valve includes two mounting holes for secure attachment and female fittings on both suction and liquid inlet/outlet ports. The suction inlet and outlet fittings have a No. 12 thread diameter, while the liquid inlet and outlet fittings have No. 6 and No. 8 thread diameters respectively, all with non-threaded connections sealed by captured o-rings to prevent leaks. The liquid inlet size measures 0.4 inches (10.15 mm), and the liquid outlet size is 0.55 inches (14 mm). This part meets or exceeds OEM standards, ensuring compatibility and performance for your vehicle.

About the Four Seasons Expansion Valve Product Line

The Expansion Valve product line from Four Seasons focuses on precise refrigerant flow control within automotive A/C systems. This line includes block-type valves designed to maintain optimal pressure and temperature balance, contributing to efficient cooling and system longevity. The 39426 valve is part of this line, offering a direct replacement solution for various Nissan and Infiniti models.

Compatible Vehicles and Common Applications

• Nissan 370Z, Altima, Maxima, Murano, Pathfinder, Rogue, Rogue Select, Rogue Sport, X-Trail
• Infiniti EX35, EX37, FX35, FX37, FX50, G25, G37, GT-R, JX35, Q40, Q50, Q60, QX50, QX60, QX70, Quest

Common Issues Addressed by This Expansion Valve

• Inconsistent or insufficient cooling in the A/C system
• Refrigerant flow irregularities causing temperature fluctuations
• Leaks or failures in the expansion valve leading to system inefficiency
• Replacement of worn or damaged OEM expansion valves
• Restoring proper pressure regulation within the A/C circuit

Installation Notes and Tips

Ensure the vehicle’s A/C system is fully evacuated and depressurized before removing the old expansion valve. Verify that the replacement valve matches the OEM specifications, including fitting sizes and refrigerant type (R134a). Use proper torque on mounting bolts and inspect O-rings for damage or wear, replacing them as necessary to maintain a leak-free seal. It is recommended to replace the receiver/drier or accumulator when servicing the expansion valve to protect the system.

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39426 meets or exceeds OEM quality standards, providing reliable performance and fitment. It includes factory-installed black and green O-rings ([24150] and [24611]) to ensure proper sealing. While specific warranty details vary, Four Seasons products typically come with a limited warranty against defects in materials and workmanship, supporting long-term durability and customer confidence.