Four Seasons 39004 A/C Expansion Valve - Front

Four Seasons 39004 Expansion Valve Overview

Four Seasons 39004 is a block-type A/C expansion valve for R134A systems, built from aluminum for the front HVAC circuit. It is listed for the 2004 Ford Expedition and 2004 Lincoln Navigator front applications from 12/1/03, and it meets or exceeds OEM requirements.

As part of the Four Seasons Expansion Valve line, this component is specified for precise refrigerant metering in the air conditioning system. The 39004 expansion valve is a direct-fit style replacement for service work on the Expedition and Navigator front A/C setup.

Key Features

• Four Seasons Expansion Valve part number 39004
• Block-type A/C expansion valve for R134A refrigerant
• Aluminum construction and aluminum finish
• Front HVAC application for 2004 Ford Expedition and 2004 Lincoln Navigator
• Female suction and liquid connections with O-ring sealing surfaces
• Meets or exceeds OEM specifications
• OE-style replacement for front A/C service

Detailed Description

The Four Seasons 39004 expansion valve regulates refrigerant flow into the evaporator, helping maintain proper system balance in the front air conditioning circuit. It uses a block-type design with female inlet and outlet connections, O-ring sealing, and R134A refrigerant compatibility. The valve is specified for 2.0 tonnage applications and is listed without a solenoid or switch.

For fitment-focused searches, this part is a direct option for a 2004 Ford Expedition front expansion valve replacement and a 2004 Lincoln Navigator front expansion valve replacement, from 12/1/03. This part cross-references UAC EX529460C for the same application.

What It Helps Address

• Weak or inconsistent front cabin cooling
• Improper refrigerant metering at the evaporator
• Compressor cycling caused by expansion valve restriction
• Front A/C performance loss in R134A systems
• Service replacement for a leaking or sticking expansion valve

Installation Notes and Tips

Verify the vehicle build date before ordering, since the listed fitment begins on 12/1/03. Confirm the suction and liquid line connection styles, thread sizes, and O-ring sealing surfaces against the original part before installation. Replace the valve only after the system has been properly evacuated and the refrigerant circuit inspected for contamination, leaks, or debris.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements. The aluminum construction and OE-style connection design support accurate replacement in the specified front HVAC applications.