Four Seasons 39146 A/C Expansion Valve - Front

Four Seasons 39146 Expansion Valve Overview

The Four Seasons 39146 expansion valve is a block-type A/C flow restrictor built for R134A systems and engineered for front HVAC service on select vehicles. It is a direct-fit style replacement for the 2003-2005 Lincoln Aviator front expansion valve application and meets or exceeds OEM requirements.

Four Seasons Expansion Valve 39146 is built from aluminum and uses O-ring connections for the liquid and suction lines. This part is specified for a 2-ton system and is listed without a solenoid, making it a focused replacement for restoring refrigerant metering in the air conditioning circuit.

Key Features

• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• Front HVAC application for 2003-2005 Lincoln Aviator
• Female O-ring line connections on suction and liquid ports
• Meets or exceeds OEM specifications
• Four Seasons 39146 direct replacement part

Product Details

The Four Seasons Expansion Valve line is built for precise refrigerant control at the evaporator inlet, helping regulate pressure drop and refrigerant flow in the A/C system. Part number 39146 uses grooved and female insert O-ring styles across the liquid and suction ports, with No. 8 liquid fittings and No. 10 suction fittings. This configuration supports a proper seal in the factory-style HVAC plumbing used on the Lincoln Aviator front system. This part cross-references UAC EX9716C for the same application.

For buyers searching for a 2003 Lincoln Aviator front expansion valve, a 2004 Lincoln Aviator front A/C expansion valve, or a 2005 Lincoln Aviator front HVAC expansion valve, Four Seasons 39146 is the listed match. It is also referenced by part number 39146 in aftermarket catalogs and interchange listings.

Common Problems This Part Can Address

• Inconsistent cabin cooling from improper refrigerant metering
• Warm air from the vents when the A/C system is charged
• Erratic evaporator performance caused by a worn expansion valve
• Restricted refrigerant flow at the front HVAC circuit
• Leaks at aging O-ring style line connections

Installation Notes and Tips

Verify the vehicle uses the front application and R134A refrigerant before ordering. Inspect the mating O-ring surfaces, line ends, and seals during service, and replace any damaged seals as needed during reassembly. Confirm the No. 8 liquid and No. 10 suction connection sizes match the original system layout before installation of part 39146.

For best results, evacuate and recharge the A/C system according to factory service procedures after replacement. Proper system flushing and leak checking are recommended whenever an expansion valve is replaced.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM specifications, giving technicians an OE-style replacement option for the Lincoln Aviator front A/C system. Four Seasons 39146 is built to the stated application and connection requirements for consistent service fitment.