Four Seasons 38805 A/C Expansion Valve

Four Seasons 38805 Expansion Valve

The Four Seasons 38805 A/C expansion valve is a TXV-style HVAC flow restrictor built for R134A systems with a brass body and 4.0 super heat setting. It is a direct-fit service part for select 1992-1993 Buick Skylark, Chevrolet Corsica, Oldsmobile Achieva, and Pontiac Grand Am applications with R12 and valve-style expansion valve setups.

Key Features

• Four Seasons Expansion Valve line
• Part number 38805
• TXV design for refrigerant metering control
• Brass construction
• Configured for R134A refrigerant type
• 4.0 super heat specification

Product Details

This Four Seasons 38805 expansion valve regulates refrigerant flow into the evaporator to maintain proper A/C system operation. It is listed for 1992-1993 Buick Skylark, 1992-1993 Chevrolet Corsica, 1992-1993 Oldsmobile Achieva, and 1992-1993 Pontiac Grand Am, with notes calling out R12 and valve-style expansion valve applications. This part cross-references Carlson 17406 and Dayco 95014 for the same application.

Common A/C Problems This Part Addresses

• Erratic evaporator refrigerant feed
• Warm air from the vents caused by poor expansion valve control
• Uneven A/C cooling performance
• System pressure imbalance related to metering issues
• Reduced cabin comfort in Buick Skylark, Chevrolet Corsica, Oldsmobile Achieva, and Pontiac Grand Am models

Installation Notes and Tips

Verify refrigerant type, system configuration, and vehicle fitment before installation. The listed applications are for valve-style expansion valve systems, so confirm the existing HVAC layout matches the notes for your vehicle. Use proper A/C service procedures, evacuate and recharge the system correctly, and inspect related components such as the compressor, condenser, and receiver/drier or accumulator during service.

Quality Assurance

Four Seasons is a recognized aftermarket HVAC brand, and the Expansion Valve line is built for service replacement in automotive air conditioning systems. Part number 38805 is cataloged with confirmed interchange references and vehicle-specific fitment data for accurate ordering.