Four Seasons 39619 A/C Expansion Valve

Four Seasons 39619 Expansion Valve for Audi Q3

Four Seasons 39619 is a block-type A/C expansion valve built for R134A systems and engineered to meter refrigerant flow through the HVAC circuit. It is a direct-fit style replacement for select Audi Q3 and Audi Q3 Quattro applications from 2015-2018.

Key Features

• Block-type A/C expansion valve for HVAC refrigerant control
• Aluminum construction
• R134A refrigerant type
• Female O-ring inlet and outlet connections
• Liquid inlet and outlet thread diameter: No. 8
• Suction inlet thread diameter: No. 10; suction outlet thread diameter: No. 12
• Two mounting holes
• Meets or exceeds OEM requirements
• Style without solenoid
• Super heat setting: -3.500

Detailed Description

The Four Seasons Expansion Valve line focuses on precise refrigerant metering for automotive air conditioning systems. Part number 39619 is a block-style expansion valve with aluminum construction and O-ring sealing surfaces, built for R134A-equipped HVAC systems. It is listed for 2015-2018 Audi Q3 and 2015-2018 Audi Q3 Quattro models, making it a targeted replacement for vehicles needing accurate refrigerant flow control in the A/C circuit. This part cross-references UAC EX10504C for the same application.

Compatible With 2015-2018 Audi Q3, N/A. Compatible With 2015-2018 Audi Q3 Quattro, N/A. Four Seasons 39619 is also referenced by OE-style interchange numbers 8U0820679 and 759835, along with A99496.

Common Issues This Part Can Address

• Inconsistent cabin cooling performance
• Improper refrigerant metering through the evaporator circuit
• Warm air from the vents when the A/C system is charged
• Erratic evaporator temperature control
• HVAC performance problems tied to a worn or restricted expansion valve

Installation Notes and Tips

Verify the vehicle uses an R134A system and confirm the connection style, thread sizes, and block-type layout before installation. Inspect the A/C system for contamination, leaks, or compressor debris before replacing the valve, and replace any damaged O-rings during service. Proper evacuation and recharge procedures are important after HVAC component replacement. Confirm fitment for Audi Q3 and Audi Q3 Quattro applications by model year before ordering.

Quality Assurance

Four Seasons 39619 is specified as meeting or exceeding OEM requirements for the listed applications. The part is built to OE-style dimensions and connection points to support accurate fitment in compatible Audi Q3 and Audi Q3 Quattro HVAC systems.