Four Seasons 39237 A/C Expansion Valve

Four Seasons 39237 Expansion Valve for Nissan and INFINITI

Four Seasons 39237 is a brass A/C expansion valve built for R134A systems with TXV operation and a 0.5 super heat setting. It is a direct-fit HVAC flow restrictor for select Nissan NX, Nissan Sentra, and INFINITI G20 applications.

Key Features

• Four Seasons Expansion Valve line
• Part number 39237
• Brass construction
• R134A refrigerant type
• TXV design for refrigerant metering
• 0.5 super heat specification
• Fits 1991-1993 Nissan NX, N/A
• Fits 1991-1993 Nissan Sentra, N/A
• Fits 1991-1992 INFINITI G20, N/A

Detailed Description

This Four Seasons expansion valve is used in the A/C system to regulate refrigerant flow into the evaporator based on system demand. The brass body and TXV design support stable refrigerant control in R134A-equipped vehicles, making part number 39237 a practical replacement for service work on Nissan NX, Nissan Sentra, and INFINITI G20 models from the listed years. This part cross-references UAC EX10052C for the same application.

What It Helps Address

• Inconsistent evaporator refrigerant feed
• Poor A/C cooling performance
• Erratic vent temperature control
• Expansion valve restriction or wear
• Service replacement for failed HVAC flow control

Installation Notes and Tips

Verify refrigerant type and system configuration before installation. Match the valve to the vehicle’s original A/C layout and confirm the TXV specification and super heat requirement during service. Clean the surrounding HVAC components and inspect seals, lines, and the evaporator circuit for contamination or damage before reassembly.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning repairs, and this expansion valve is built to the listed material and refrigerant specifications for the confirmed applications.