Four Seasons 38679 A/C Expansion Valve

Four Seasons 38679 Expansion Valve Overview

Four Seasons 38679 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 to help maintain stable evaporator performance in automotive HVAC systems.

For service work on vehicles such as Honda Civic and Toyota Corolla applications, this expansion valve supports accurate refrigerant metering in the A/C circuit. The Four Seasons Expansion Valve line focuses on direct-fit replacement parts for common automotive air conditioning repairs.

Key Features

• Part number 38679 A/C expansion valve
• Block type design for automotive HVAC systems
• Aluminum construction and aluminum finish
• R134A refrigerant type
• Female FIO insert O-ring inlet and outlet connections
• 2 mounting holes for secure installation
• Super heat setting: 5.000
• Meets or exceeds OEM specifications
• Style: w/o solenoid

Detailed Product Description

This Four Seasons expansion valve meters liquid refrigerant into the evaporator based on system demand, helping the A/C system maintain proper cooling performance and pressure balance. It uses female suction and liquid connections with insert O-ring FIO styles, including No. 8 and No. 10 suction thread diameters and No. 6 and No. 8 liquid thread diameters. The valve is built for R134A systems and is specified as a 2.000 ton unit, making it a practical replacement for many passenger vehicle HVAC repairs.

This part cross-references FEL-PRO 1612 for the same application.

What It Helps Address

• Weak or inconsistent cabin cooling
• Improper refrigerant metering at the evaporator
• A/C pressure imbalance caused by a worn valve
• Expansion valve leakage at the HVAC block connection
• Service replacement for R134A air conditioning repairs

Installation Notes and Tips

Verify the refrigerant type, connection style, and port sizes before installation. Replace the O-rings with the correct green O-ring seals for the system, and inspect the mating surfaces for wear, corrosion, or contamination. Proper evacuation and recharge procedures are required after A/C service. Confirm vehicle-specific HVAC layout for Honda Civic, Toyota Corolla, and other make/model applications before ordering.

Quality Assurance

Four Seasons 38679 is built to meet or exceed OEM specifications for automotive A/C service. The Four Seasons Expansion Valve line is intended for professional-grade HVAC repair where accurate refrigerant control and correct fitment are required.