Four Seasons 38879 A/C Expansion Valve

Four Seasons 38879 Expansion Valve Overview

Four Seasons 38879 is a block-type A/C expansion valve for R134A systems, built from aluminum for service in automotive HVAC refrigerant control. It uses female O-ring connections on the suction and liquid sides and meets or exceeds OEM requirements for direct replacement service.

For drivers searching for an A/C expansion valve for Honda Civic or similar HVAC repair applications, this Four Seasons Expansion Valve line provides a precise refrigerant metering component for restoring proper evaporator performance. Part number 38879 is also referenced in aftermarket cross listings for the same application.

Key Features

• Four Seasons Expansion Valve, part number 38879
• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Female O-ring suction and liquid fittings
• Meets or exceeds OEM specifications
• Designed without solenoid
• Super heat setting: 8.000
• 1.500 tonnage rating

Product Details

This HVAC flow restrictor meters refrigerant into the evaporator to help maintain stable A/C operation. The Four Seasons 38879 expansion valve uses No. 8 and No. 10 suction connections, plus No. 6 and No. 8 liquid connections, with the listed thread and O-ring styles for proper sealing in R134A systems. It is a direct-fit style service part for vehicles that use this block-type valve design, including applications commonly searched as Honda Civic A/C expansion valve replacement and Four Seasons 38879 HVAC repair part.

This part cross-references Monroe Shocks & Struts (e.g., 182217) for the same application.

What It Helps Fix

• Weak or uneven cabin cooling
• Incorrect refrigerant flow through the evaporator
• A/C performance issues caused by a worn expansion valve
• Sealing problems at O-ring style refrigerant connections
• HVAC service needs on R134A-equipped vehicles

Installation Notes and Tips

Verify the valve style, fitting sizes, and refrigerant type before installation. Replace and lubricate the specified O-rings during service, and confirm the system is clean, evacuated, and charged to the vehicle manufacturer’s specifications after repair. Because fitment data is not listed in the supplied vehicle table, confirm application by part number and HVAC configuration before ordering.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, making 38879 a specification-based replacement for professional A/C service.