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Four Seasons 39579 A/C Expansion Valve - Front
| Brand | Four Seasons 39579 |
|---|---|
| Position | Front |
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 5 |
| Liquid Inlet Size IN | 0.28 |
| Liquid Inlet Size MM | 7.1 |
| Liquid Inlet Style | O-Ring |
| Liquid Inlet Thread Type | Not Threaded |
| Liquid Inlet Type | O-Ring |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 6 |
| Liquid Outlet Style | O-Ring |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | O-Ring |
| Lqd Out Size IN | 0.46 |
| Lqd Out Size MM | 11.8 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| O-Ring A Number/Desc | [24401] / Slim Line Sealing Washer |
| O-Ring B Number/Desc | [24402] / Slimline Washer |
| O-Ring C Number/Desc | [24403] / Slimline Washer |
| O-Ring D Number/Desc | [24404] / Slimline Washer |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suc In Size IN | 0.63 |
| Suc In Size MM | 16 |
| Suc Out Size IN | 0.63 |
| Suc Out Size MM | 16 |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 10 |
| Suction Inlet Style | Sealing Washer |
| Suction Inlet Thread Type | Not Threaded |
| Suction Inlet Type | Sealing Washer |
| Suction Outlet Fitting Gender | Female |
| Suction Outlet Fitting Thread Diameter | No. 10 |
| Suction Outlet Style | Sealing Washer |
| Suction Outlet Thread Type | Not Threaded |
| Suction Outlet Type | Sealing Washer |
| Super Heat | -4.50 |
| Switch Included? | Not Included |
| Tonnage | 1.5 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | Honda · 8 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable service.
Block type design. Aluminum construction with R134A refrigerant compatibility.
No solenoid included. A straightforward expansion valve for HVAC flow control.
Cross-references Four Seasons 39579, Global Parts Distributors LLC 3411617 and UAC EX10670C for the same application. See all 9.
Four Seasons 39579 Expansion Valve Overview
The Four Seasons 39579 expansion valve is a block-type A/C flow restrictor built for R134A systems and engineered for precise refrigerant control. It is a direct-fit style replacement for select Honda Pilot and Honda Ridgeline applications, including front HVAC service on the 2016-2017 Honda Pilot.
Key Features
- Four Seasons Expansion Valve, part number 39579
- Block-type design for R134A air conditioning systems
- Aluminum construction with aluminum finish
- Female suction and liquid connections with O-ring sealing surfaces
- Two mounting holes for OE-style installation
- Meets or exceeds OEM specifications
- 1.5 tonnage rating
- W/o solenoid style
Product Details
Four Seasons 39579 is an A/C expansion valve designed to regulate refrigerant flow into the evaporator so the system can maintain proper cooling performance. This valve uses female inlet and outlet connections, including No. 10 suction fittings and No. 5 / No. 6 liquid fittings, with O-ring and sealing washer interfaces for serviceable sealing. The super heat specification is -4.50, and the valve is configured for R134A refrigerant applications. For shoppers searching for a Honda Pilot expansion valve or Honda Ridgeline A/C expansion valve, this part number 39579 is a direct reference to the correct HVAC flow control component.
This part cross-references UAC EX10670C for the same application.
Vehicle Fitment
- Fits 2018-2020 Honda Pilot, N/A, Expansion Valve
- Fits 2017-2019 Honda Ridgeline, N/A, Expansion Valve
- Fits 2016-2017 Honda Pilot, Front, Expansion Valve
Common Repair Symptoms
- Inconsistent cabin cooling or weak vent temperatures
- Improper refrigerant metering through the evaporator circuit
- A/C performance issues after compressor or system service
- Restricted or unstable refrigerant flow in the HVAC system
- Need for a direct replacement expansion valve on Honda Pilot or Honda Ridgeline models
Installation Notes and Tips
Verify the vehicle’s refrigerant system configuration before installation and match the suction and liquid fitting sizes to the original component. Replace worn sealing washers or O-rings during service, evacuate and recharge the system to the correct specification, and confirm proper operation after installation. For fitment-based searches, this Four Seasons 39579 expansion valve is listed for 2018-2020 Honda Pilot, 2017-2019 Honda Ridgeline, and 2016-2017 Honda Pilot front HVAC applications.
Quality Assurance
Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, supporting OE-style fit and function for the specified Honda Pilot and Honda Ridgeline applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2020 | Honda | Pilot | N/A | Expansion Valve |
| 2019 | Honda | Pilot | N/A | Expansion Valve |
| 2019 | Honda | Ridgeline | N/A | Expansion Valve |
| 2018 | Honda | Pilot | N/A | Expansion Valve |
| 2018 | Honda | Ridgeline | N/A | Expansion Valve |
| 2017 | Honda | Pilot | Front | Expansion Valve |
| 2017 | Honda | Ridgeline | N/A | Expansion Valve |
| 2016 | Honda | Pilot | Front | Expansion Valve |
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