/live/media/FS/FS_39545_Fro.jpg)
Four Seasons 39545 A/C Expansion Valve
| Brand | Four Seasons 39545 |
|---|---|
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Inlet Size IN | 0.34 |
| Liquid Inlet Size MM | 8.6 |
| Liquid Inlet Style | Sealing Washer |
| Liquid Inlet Thread Type | Not Threaded |
| Liquid Inlet Type | Sealing Washer |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 8 |
| Liquid Outlet Style | Sealing Washer |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | Sealing Washer |
| Lqd Out Size IN | 0.46 |
| Lqd Out Size MM | 11.8 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suc In Size IN | 0.63 |
| Suc In Size MM | 16 |
| Suc Out Size IN | 0.700 |
| Suc Out Size MM | 17.7 |
| 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 | -13.500 |
| Switch Included? | Not Included |
| Tonnage | 1.5 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | Ford · 16 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable service.
Aluminum construction. Lightweight material helps resist corrosion in the A/C system.
Block type design. Built as an expansion valve for precise refrigerant flow control.
Cross-references Four Seasons 39545, 217545 and 759755 for the same application. See all 10.
Four Seasons 39545 Expansion Valve
Four Seasons 39545 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and sealing-washer connections for precise refrigerant metering. It is an OE-style replacement that meets or exceeds OEM requirements and is listed for 2015-2023 Ford Mustang applications.
Key Features
- Brand: Four Seasons Expansion Valve
- Part number: 39545
- Block-type A/C expansion valve for R134A refrigerant
- Aluminum construction with aluminum finish
- Female suction and liquid fittings with sealing-washer style connections
- Liquid inlet/outlet sizes: 8.6 mm and 11.8 mm
- Suction inlet/outlet sizes: 16 mm and 17.7 mm
- 2 mounting holes
- Style: w/o solenoid
- Meets or exceeds OEM specifications
- Fits 1.5 tonnage applications
Product Details
This Four Seasons expansion valve is engineered for HVAC flow control in R134A air conditioning systems. As a block-type valve, it regulates refrigerant flow into the evaporator to help maintain proper cooling performance in the Ford Mustang A/C system. The part number 39545 also cross-references Ford OE numbers FR3Z19849A and FR3Z19849D for the same application.
Compatible with 2015-2023 Ford Mustang, this A/C expansion valve is a direct-fit service part for vehicles needing accurate refrigerant control at the evaporator inlet. Four Seasons 39545 is a practical choice when replacing a worn or restricted expansion valve in Mustang HVAC service.
What It Helps Fix
- Weak or inconsistent cabin cooling
- Incorrect refrigerant metering at the evaporator
- Temperature swings from a sticking expansion valve
- Restricted A/C flow in an R134A system
- HVAC performance loss related to valve wear or contamination
Installation Notes and Tips
Verify the system uses R134A refrigerant and confirm the block-style valve layout before installation. Inspect sealing surfaces, O-rings, and adjacent A/C components for contamination or damage, and evacuate and recharge the system according to factory service procedures after replacement. Confirm fitment for your specific 2015-2023 Ford Mustang configuration using the OE reference and connection sizes listed above.
Quality Assurance
Four Seasons lists this expansion valve as meeting or exceeding OEM specifications, supporting OE-level fit and function for service replacement use.
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2023 | Ford | Mustang | — | 5.0L | V8 | N/A | Expansion Valve |
| 2022 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| 2021 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| 2020 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| 2019 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| 2018 | Ford | Mustang | Shelby GT350 | — | — | N/A | Expansion Valve |
| 2018 | Ford | Mustang | Shelby GT350R | — | — | N/A | Expansion Valve |
| 2017 | Ford | Mustang | — | 3.7L | V6 | N/A | Expansion Valve |
| 2017 | Ford | Mustang | — | 5.0L | V8 | N/A | Expansion Valve |
| 2017 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| 2016 | Ford | Mustang | — | 3.7L | V6 | N/A | Expansion Valve |
| 2016 | Ford | Mustang | — | 5.0L | V8 | N/A | Expansion Valve |
| 2016 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| 2015 | Ford | Mustang | — | 3.7L | V6 | N/A | Expansion Valve |
| 2015 | Ford | Mustang | — | 5.0L | V8 | N/A | Expansion Valve |
| 2015 | Ford | Mustang | — | 5.2L | V8 | N/A | Expansion Valve |
| No rows match your filter. | |||||||