Four Seasons 39042 A/C Expansion Valve

Four Seasons 39042 Expansion Valve Overview

The Four Seasons 39042 A/C expansion valve is a brass TXV built for R134A systems and calibrated to a 4.0 superheat setting. It regulates refrigerant flow into the evaporator to support stable cabin cooling in select Lexus LS400 and Toyota Cressida applications.

As part of the Four Seasons Expansion Valve line, this component is focused on precise refrigerant metering for service repairs where the original valve is restricted, sticking, or no longer controlling flow correctly.

Key Features

• Part number 39042 A/C expansion valve for HVAC flow control
• Brass construction
• TXV design for refrigerant metering
• Configured for R134A refrigerant systems
• 4.0 superheat specification
• Fits 1990-1992 Lexus LS400, N/A
• Fits 1989-1992 Toyota Cressida, N/A

Detailed Description

This Four Seasons expansion valve 39042 controls the amount of refrigerant entering the evaporator based on system demand, helping maintain proper A/C performance in vehicles using R134A. It is a direct-fit service part for 1990-1992 Lexus LS400 and 1989-1992 Toyota Cressida HVAC systems, where accurate refrigerant flow is critical to consistent vent temperatures and system balance. This part cross-references UAC EX10063C for the same application.

Common Repair Uses

• Restores refrigerant metering when the original valve is clogged or restricted
• Addresses uneven or weak A/C cooling output
• Helps correct evaporator feed issues that affect cabin temperature control
• Supports repair of A/C systems showing pressure or flow irregularities
• Replaces a worn TXV in Lexus LS400 and Toyota Cressida HVAC service work

Installation Notes and Tips

Verify refrigerant type, system configuration, and service access before replacement. Inspect the surrounding A/C components, including the evaporator inlet area and related seals, for contamination or wear that could affect the new valve. After installation, evacuate and recharge the system according to the vehicle service procedure and confirm proper operation under normal engine and A/C load.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning repairs, and this expansion valve is built to match the specified TXV and refrigerant requirements for the listed applications. Confirm fitment by year, make, and model before ordering.