Four Seasons 39487 A/C Expansion Valve

Four Seasons 39487 Expansion Valve Overview

Four Seasons 39487 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and O-ring inlet and outlet connections. It is an OE-style HVAC flow restrictor that meters refrigerant into the evaporator for stable cooling performance in the vehicle air conditioning system.

For drivers searching for an A/C expansion valve for Honda Civic or Toyota Corolla HVAC repair, this Four Seasons expansion valve 39487 is a direct-fit style service part for R134A applications that use a block-type valve design.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39487
• Block-type A/C expansion valve for HVAC refrigerant control
• Aluminum construction for corrosion resistance and durability
• Designed for R134A refrigerant systems
• O-ring liquid and suction connections
• Female inlet and outlet fittings
• Meets or exceeds OEM requirements
• Style: w/o solenoid
• Super heat setting: -1.000
• Tonnage: 2.0

Product Details

The Four Seasons 39487 expansion valve regulates refrigerant flow from the liquid line into the evaporator, helping maintain proper system pressure and temperature balance. Its block-type layout, aluminum body, and O-ring sealing surfaces support service work on R134A air conditioning systems that require No. 6 and No. 8 liquid connections along with No. 10 and No. 12 suction connections. This part cross-references 759487 and 932249 for the same application.

When replacing an A/C expansion valve on a Honda Civic or Toyota Corolla, matching the refrigerant type, connection style, and valve configuration is critical. Four Seasons 39487 is built for those service requirements and is listed as meeting or exceeding OEM specifications.

Common A/C Problems This Part Can Address

• Erratic evaporator cooling caused by a restricted or worn expansion valve
• Incorrect refrigerant metering that leads to poor cabin air temperature control
• Pressure imbalance in the A/C system after valve wear or contamination
• Cooling loss in R134A systems with block-type valve layouts
• Leak concerns at aging O-ring connection points during HVAC service

Installation Notes and Tips

Confirm the vehicle uses an R134A system with a block-type expansion valve before ordering. Verify the suction and liquid line thread sizes, O-ring connection style, and mounting hole layout against the original part. Clean the mating surfaces, replace damaged seals as needed, and evacuate and recharge the system according to factory service procedures after installation. For fitment-based searches, this part is commonly sought for Honda Civic and Toyota Corolla A/C repair applications, but final compatibility should always be matched to the vehicle’s original HVAC configuration.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, making it a service-grade replacement for HVAC repairs where accurate refrigerant control is needed. Part number 39487 is supported by Four Seasons interchange references and is built to the specifications shown above.