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Four Seasons 39420 A/C Expansion Valve - Front
| Brand | Four Seasons 39420 |
|---|---|
| Position | Front |
| Material | Aluminum |
| Color | Aluminum |
| Refrigerant Type | R134a |
| Type | Block type |
| Mounting Hole Quantity | 2 |
| Suction Inlet Fitting Gender | Female |
| Suction Outlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 8 |
| Suction Outlet Fitting Thread Diameter | No. 10 |
| Suction Inlet Thread Type | Not threaded |
| Suction Outlet Thread Type | Not threaded |
| Liquid Inlet Fitting Gender | Female |
| Liquid Outlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Outlet Fitting Thread Diameter | No. 8 |
| Liquid Inlet Thread Type | Not threaded |
| Liquid Outlet Thread Type | Not threaded |
| Description | Expansion valves |
| Liquid Inlet Size IN | 0.41 |
| Liquid Inlet Size MM | 10.3 |
| Liquid Inlet Style | Female insert o-ring |
| Liquid Inlet Type | O-ring |
| Liquid Outlet Style | Female insert o-ring |
| Liquid Outlet Type | O-ring |
| Lqd Out Size IN | 0.53 |
| Lqd Out Size MM | 13.4 |
| Meets / Exceeds OEM? | Yes |
| Style | W/o solenoid |
| Suc In Size IN | 0.53 |
| Suc In Size MM | 13.4 |
| Fits | — |
OE direct replacement. Meets or exceeds OEM requirements for a confident fit.
Aluminum block type. Lightweight construction with a clean, corrosion-resistant finish.
R134A compatible. Built for modern A/C refrigerant systems.
Cross-references Four Seasons 39420, 123024A and 540044BSM for the same application. See all 11.
Four Seasons 39420 Expansion Valve Overview
Four Seasons 39420 is a block-type A/C expansion valve for R134A systems. Built from aluminum and engineered to meet or exceed OEM requirements, it regulates refrigerant flow to support stable evaporator performance in the HVAC system.
For technicians and owners searching for an A/C expansion valve for Honda Civic, Toyota Corolla, or similar R134A applications, Four Seasons 39420 provides the correct block-style layout with female O-ring connections and OE-style fitment details.
Key Features
- Brand: Four Seasons Expansion Valve
- Part number: 39420
- Block-type A/C expansion valve for R134A refrigerant
- Aluminum construction with aluminum finish
- Female insert O-ring liquid and suction connections
- Liquid inlet/outlet sizes: 0.41 in (10.3 mm) and 0.53 in (13.4 mm)
- Suction inlet/outlet sizes: 0.53 in (13.4 mm) and 0.64 in (16.2 mm)
- Super heat setting: 4.5
- Meets or exceeds OEM specifications
- Style: w/o solenoid
Product Details
The Four Seasons Expansion Valve line focuses on refrigerant metering components that match OE-style service requirements. This 39420 valve uses a block configuration with female insert O-ring ports for the liquid and suction sides, making it a direct-spec replacement for systems that require precise refrigerant control at the evaporator. The 1.500 tonnage rating and 4.5 super heat setting support proper system balance in R134A HVAC setups.
Cross-reference part numbers include 123024A and 540044BSM for the same application. Four Seasons 39420 is a practical choice when replacing a worn or restricted expansion valve in Honda Civic, Toyota Corolla, and other vehicles using the same block-type layout.
Common Problems This Part Can Address
- Weak or inconsistent cabin cooling
- Incorrect refrigerant metering at the evaporator
- Frosting or uneven A/C performance caused by flow restriction
- Compressor cycling issues related to refrigerant control
- Service replacement for a leaking or sticking expansion valve
Installation Notes and Tips
Verify refrigerant type, port sizes, and block-style configuration before installation. Inspect mating surfaces and O-rings, and confirm the system is clean and properly evacuated before recharging. This valve does not include a switch.
Use the vehicle service information for the exact A/C system layout and confirm the part number 39420 against the original component before assembly.
Quality Assurance
Four Seasons 39420 is built to meet or exceed OEM specifications for A/C service applications. The aluminum construction and OE-style connection design support consistent replacement quality for professional HVAC repairs.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||