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Four Seasons 39439 A/C Expansion Valve - Front
| Brand | Four Seasons 39439 |
|---|---|
| Position | Front |
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Inlet Size IN | 0.4 |
| Liquid Inlet Size MM | 10.15 |
| Liquid Inlet Style | Captured O-Ring |
| Liquid Inlet Thread Type | Not Threaded |
| Liquid Inlet Type | O-Ring |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 8 |
| Liquid Outlet Style | Female Insert O-Ring |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | O-Ring |
| Lqd Out Size IN | 0.550 |
| Lqd Out Size MM | 14.000 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| O-Ring A Number/Desc | [24150] / Black O-Ring |
| O-Ring B Number/Desc | [24611] / Green O-Ring |
| O-Ring C Number/Desc | [24661] / Green O-Ring |
| O-Ring D Number/Desc | [24681] / Green O-Ring |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suc In Size IN | 0.700 |
| Suc In Size MM | 17.8 |
| Suc Out Size IN | 0.72 |
| Suc Out Size MM | 18.3 |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 12 |
| Suction Inlet Style | Female Insert O-Ring |
| Suction Inlet Thread Type | Not Threaded |
| Suction Inlet Type | O-Ring |
| Suction Outlet Fitting Gender | Female |
| Suction Outlet Fitting Thread Diameter | No. 12 |
| Suction Outlet Style | Captured O-Ring |
| Suction Outlet Thread Type | Not Threaded |
| Suction Outlet Type | O-Ring |
| Super Heat | 5.500 |
| Switch Included? | Not Included |
| Tonnage | 1.500 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | INFINITI · 2 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable A/C flow control.
Aluminum construction. Lightweight material resists corrosion in demanding HVAC service.
Block type design. Built for precise refrigerant metering without a solenoid.
Cross-references Four Seasons 39439, Global Parts Distributors LLC 3411543 and 180403 for the same application. See all 8.
Four Seasons 39439 Expansion Valve
Four Seasons 39439 is a block-type A/C expansion valve for R134A systems, built from aluminum for front HVAC service. It is listed for 2011-2012 INFINITI QX56 front applications and meets or exceeds OEM requirements for direct replacement use.
Key Features
- Brand: Four Seasons Expansion Valve line
- Part number: 39439
- Block-type A/C expansion valve for R134A refrigerant
- Aluminum construction with aluminum finish
- Front position fitment for 2011-2012 INFINITI QX56
- Female O-ring suction and liquid connections
- Captured O-ring and female insert O-ring styles for the listed ports
- Meets or exceeds OEM specifications
- Designed for 1.5 tonnage systems with 5.5 superheat
Product Details
The Four Seasons Expansion Valve product line focuses on OE-style HVAC flow control for automotive air conditioning systems. Part number 39439 uses a block-type layout with aluminum body construction and R134A refrigerant compatibility. Connection details include No. 12 suction inlet and outlet thread diameters, No. 6 liquid inlet, and No. 8 liquid outlet, with female O-ring fittings and non-threaded interfaces where specified. This part cross-references Global Parts Distributors LLC 3411543 for the same application.
For front A/C service on the 2011-2012 INFINITI QX56, this expansion valve helps regulate refrigerant flow across the evaporator circuit. The listed fitment and OE-level specification make Four Seasons 39439 a direct-reference choice when replacing a worn or restricted valve in the HVAC system.
Common Issues This Part Can Address
- Inconsistent cabin cooling from improper refrigerant metering
- Front A/C performance loss caused by a restricted expansion valve
- Evaporator temperature control problems in R134A systems
- HVAC pressure imbalance related to valve wear or contamination
- Service replacement needs on 2011-2012 INFINITI QX56 front air conditioning systems
Installation Notes and Tips
Verify refrigerant type, port style, and line sizes before installation. Replace the valve only after the system has been properly evacuated and inspected for contamination, leaks, and compressor debris. Use the listed O-ring sealing points and confirm correct orientation during assembly on the front HVAC circuit of the INFINITI QX56. After installation, evacuate and recharge the system to the vehicle specification and confirm vent temperature and operating pressures.
Quality Assurance
Four Seasons 39439 is specified as meeting or exceeding OEM requirements for the listed application. It is built as an OE-style replacement expansion valve for service work on 2011-2012 INFINITI QX56 front HVAC systems.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2012 | INFINITI | QX56 | Front | Exp Valve; Expansion Valve |
| 2011 | INFINITI | QX56 | Front | Expansion Valve |
| No rows match your filter. | ||||