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Four Seasons 39673 A/C Expansion Valve
| Brand | Four Seasons 39673 |
|---|---|
| Material | Aluminum |
| Refrigerant Type | R134a |
| Type | Block type |
| Mounting Hardware Included | No |
| Description | Expansion valves |
| Liquid Inlet Size | No. 6 |
| Liquid Inlet Style | O-ring |
| Liquid Outlet Size | No. 8 |
| Liquid Outlet Style | O-ring |
| Meets / Exceeds OEM? | Yes |
| Style | W/o solenoid |
| Suction Inlet Size | No. 10 |
| Suction Inlet Style | O-ring |
| Suction Outlet Size | No. 12 |
| Suction Outlet Style | O-ring |
| Super Heat | -9.0 |
| Tonnage | 1.5 |
| Product line | Expansion Valve |
| Fits | Subaru · 6 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable performance.
Aluminum construction. Lightweight material resists corrosion in demanding HVAC service.
Block type design. Provides precise refrigerant flow control for efficient cooling.
Cross-references Four Seasons 39673, Global Parts Distributors LLC 3412028 and UAC EX10665C for the same application. See all 9.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Four Seasons 39673 Expansion Valve for Subaru HVAC Repair
The Four Seasons 39673 A/C expansion valve is a block-type HVAC flow restrictor built for R134A systems and engineered for stable refrigerant control. It is a direct-fit service part for Subaru WRX and Subaru Forester applications, with OE-style O-ring connections and aluminum construction.
Key Features
- Block-type A/C expansion valve for R134A refrigerant systems
- Aluminum body for HVAC service durability
- OE-style O-ring inlet and outlet connections
- Meets or exceeds OEM requirements
- Super heat setting: -9.0
- 1.5 tonnage rating
- Four Seasons part number 39673
Product Details
Four Seasons 39673 is part of the Expansion Valve product line, focused on precise refrigerant metering for mobile air conditioning systems. Backed by more than 50 years of mobile A/C experience, Four Seasons builds this valve to support consistent system performance in Subaru WRX and Subaru Forester HVAC repairs. This part cross-references UAC EX10665C for the same application.
Compatible With 2022-2026 Subaru WRX and 2019-2024 Subaru Forester, this expansion valve uses No. 6 liquid inlet, No. 8 liquid outlet, No. 10 suction inlet, and No. 12 suction outlet sizes with O-ring styles throughout. The w/o solenoid design and block-type layout make it a practical replacement when servicing the A/C metering circuit on these Subaru models. Four Seasons 39673 is also referenced by OE-style numbers including 73531SJ000 and 73531SJ010.
Common Repair Symptoms
- Weak or inconsistent cabin cooling
- Incorrect refrigerant flow through the evaporator circuit
- Pressure imbalance in the A/C system
- Temperature fluctuations during compressor operation
- Expansion valve restriction or internal wear
Installation Notes
Verify refrigerant type, line sizes, and O-ring sealing surfaces before installation. Replace worn seals, evacuate the system, and recharge to the correct specification after service. Because mounting hardware is not included, reuse or source the required hardware as needed for the repair.
Quality Assurance
Four Seasons tests its HVAC components for long service life and consistent operation. The 39673 expansion valve is built to meet or exceed OEM standards for Subaru WRX and Subaru Forester A/C service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2023 | Subaru | Forester | N/A | Expansion Valve |
| 2022 | Subaru | Forester | N/A | Expansion Valve |
| 2022 | Subaru | WRX | N/A | Expansion Valve |
| 2021 | Subaru | Forester | N/A | Expansion Valve |
| 2020 | Subaru | Forester | N/A | Expansion Valve |
| 2019 | Subaru | Forester | N/A | Expansion Valve |
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