Four Seasons 39550 A/C Expansion Valve - Front or Rear

Four Seasons 39550 Expansion Valve for Ford Transit HVAC

Four Seasons 39550 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and sealing-washer connections for the liquid and suction lines. It is an OE-style HVAC flow restrictor for front-system service on Ford Transit vans, including Transit-150, Transit-250, Transit-350, Transit-350 HD, and E-Transit applications.

The Four Seasons Expansion Valve line focuses on precise refrigerant metering for automotive air conditioning service. This part number, 39550, meets or exceeds OEM requirements and uses a 1-ton, 10-degree superheat calibration without a solenoid.

Key Features

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Female sealing-washer fittings on suction and liquid ports
• Liquid inlet size: 0.34 in. (8.6 mm); liquid outlet size: 0.46 in. (11.8 mm)
• Suction inlet size: 0.63 in. (16 mm); suction outlet size: 0.700 in. (17.7 mm)
• 2 mounting holes for front HVAC service
• Meets or exceeds OEM specifications
• Style: without solenoid

Detailed Description

Four Seasons 39550 is an A/C expansion valve used to regulate refrigerant flow into the evaporator on Ford Transit front HVAC systems. By controlling liquid refrigerant delivery, it helps maintain proper system balance in R134A air conditioning circuits. This part is a direct-fit style replacement for front applications on 2015-2025 Ford Transit-150, Transit-250, Transit-350, Transit-350 HD, and 2022-2024 Ford E-Transit, plus 2015-2020 Ford Transit and Transit Custom, and 2018 Ford Transit Connect rear service.

This part cross-references UAC EX10497C for the same application. Four Seasons 39550 is also referenced by OE-style numbers used in the same Ford Transit HVAC platform, making it a practical choice when replacing a worn or restricted expansion valve.

What It Helps Fix

• Warm air from the vents caused by incorrect refrigerant metering
• Uneven cabin cooling in Ford Transit front HVAC systems
• Evaporator performance issues related to a restricted or sticking valve
• Pressure imbalance in an R134A air conditioning circuit
• Service complaints tied to poor refrigerant flow control

Installation Notes and Tips

Verify the vehicle’s refrigerant type, port style, and mounting layout before installation. This valve uses female sealing-washer connections and is not threaded, so line alignment and sealing surface condition matter during service. Replace any damaged seals or washers as required by the vehicle’s HVAC procedure, and evacuate and recharge the system according to factory specifications after installation.

Quality Assurance

Four Seasons 39550 is built to meet or exceed OEM requirements for the listed Ford Transit applications. The aluminum construction and calibrated superheat setting support consistent refrigerant control in front HVAC service.