Four Seasons 39655 A/C Expansion Valve

Four Seasons 39655 Expansion Valve for Nissan HVAC Service

Four Seasons 39655 is a block-type A/C expansion valve built for R134A systems and OE-style service on select Nissan trucks. It uses an aluminum body, O-ring connections, and a no-solenoid design to match the factory HVAC layout on covered applications.

Compatible With 2019-2024 Nissan TITAN XD and 2019-2021 Nissan TITAN, this expansion valve is a direct-fit replacement for the factory A/C flow control component. The Four Seasons Expansion Valve line focuses on accurate refrigerant metering and OE replacement fitment for service repairs.

Key Features

• Part number 39655
• Block-type A/C expansion valve
• Aluminum construction
• R134A refrigerant system application
• Female O-ring inlet and outlet connections
• No. 10 suction inlet, No. 12 suction outlet
• No. 6 liquid inlet, No. 8 liquid outlet
• 2 mounting holes
• Super heat setting: -1.500
• Meets or exceeds OEM requirements

Detailed Description

This Four Seasons expansion valve meters refrigerant flow into the evaporator to help maintain proper A/C system performance. It is specified as a block-type valve with female O-ring fittings, aluminum construction, and no solenoid, making it a direct replacement for service on Nissan TITAN and Nissan TITAN XD models listed below. Part number 39655 is also cross-referenced with UAC EX10712C for the same application.

Fits 2019-2024 Nissan TITAN XD, N/A. Fits 2019-2021 Nissan TITAN, N/A. Fits 2022 Nissan TITAN, N/A, to 12/2021.

Common Problems This Part May Address

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• A/C performance loss caused by a worn expansion valve
• Temperature fluctuations during compressor operation
• HVAC service needs on R134A-equipped Nissan trucks

Installation Notes and Tips

Verify the vehicle’s A/C system uses the listed R134A configuration before installation. Match the inlet and outlet fitting sizes, O-ring style connections, and mounting points to the original valve. On 2022 Nissan TITAN applications, confirm the build date is through 12/2021 before ordering. Replace seals and evacuate and recharge the system according to factory service procedures after installation.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements for the covered applications. The part is built for OE-style fitment and service reliability in factory-equivalent HVAC repairs.