Four Seasons 39490 A/C Expansion Valve - Front

Four Seasons 39490 A/C Expansion Valve

Four Seasons 39490 is a block-type A/C expansion valve for R134A systems. Built from aluminum and engineered to meet or exceed OEM requirements, it regulates refrigerant flow through the evaporator circuit for stable HVAC performance in the right application.

For buyers searching for an A/C expansion valve for Honda Civic, Toyota Corolla, or similar R134A-equipped vehicles, this Four Seasons Expansion Valve line focuses on accurate refrigerant metering and OE-style fitment details. Part number 39490 is also referenced in aftermarket catalogs under several cross-reference numbers for the same application.

Key Features

• Four Seasons Expansion Valve line, part number 39490
• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• O-ring liquid and suction connections
• Female inlet and outlet fittings
• Two mounting holes
• Style: w/o solenoid
• Meets or exceeds OEM specifications
• 1-ton rating with -1.000 super heat specification

Product Details

This A/C expansion valve meters refrigerant into the evaporator based on system demand, helping maintain proper cooling performance and pressure balance. The liquid inlet uses a No. 6 female O-ring connection, the liquid outlet uses a No. 8 female O-ring connection, and the suction side uses No. 12 female O-ring connections. The valve is built for R134A service and is listed as a block type design without a solenoid.

Part number 39490 is a practical choice for service work on vehicles that require an OE-style expansion valve replacement. It is commonly searched as Four Seasons 39490 expansion valve, A/C expansion valve 39490, and R134A block type expansion valve for automotive HVAC repair.

This part cross-references FEL-PRO 1684 for the same application.

Common HVAC Issues It Can Address

• Weak or inconsistent cabin cooling
• Improper refrigerant metering at the evaporator
• Pressure imbalance in the A/C circuit
• Expansion valve restriction or wear-related performance loss
• Service replacement for a leaking or malfunctioning valve

Installation Notes

Verify refrigerant type, port style, and fitting sizes before installation. Replace O-rings as required during A/C service, evacuate the system properly, and recharge to the vehicle manufacturer’s specified refrigerant amount. Confirm the valve orientation and mounting-hole alignment during assembly.

Compatible With vehicles using a block-type R134A expansion valve configuration, including search queries for Honda Civic and Toyota Corolla A/C repair applications where this part number is specified.

Quality Assurance

Four Seasons 39490 is listed as meeting or exceeding OEM requirements, making it a direct-fit service part for the specified HVAC application. The Four Seasons Expansion Valve line is built for accurate refrigerant control in automotive A/C systems.