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Four Seasons 38663 A/C Expansion Valve
| Brand | Four Seasons 38663 |
|---|---|
| Color | Brass |
| Refrigerant Type | R134A |
| Super Heat | 8.0 |
| Type | TXV |
| Product line | Expansion Valve |
| Fits | Mazda · 22 vehicles |
TXV design. Provides precise refrigerant flow control for efficient A/C performance.
Brass construction. Durable material suited for demanding HVAC service.
R134A compatible. Built for systems using R134A refrigerant.
Cross-references AMS Automotive 4619, Davico Mfg 17545 and Dorman - HELP 38663 for the same application. See all 32.
Four Seasons 38663 Expansion Valve Overview
The Four Seasons 38663 A/C expansion valve is a TXV-style HVAC flow restrictor built for R134A systems with a brass body and an 8.0 super heat setting. It is used to regulate refrigerant flow into the evaporator, helping maintain stable air conditioning performance in supported Mazda applications.
Compatible With 1993-1997 Mazda 626, 1993-1997 Mazda MX-6, 1991-1995 Mazda 323, 1990-1994 Mazda Protege, and 1992-1993 Mazda MX-3.
Key Features
- Brand: Four Seasons Expansion Valve
- Part number: 38663
- TXV design for controlled refrigerant metering
- Brass construction
- Configured for R134A refrigerant
- 8.0 super heat specification
Product Details
Four Seasons 38663 is an A/C expansion valve for Mazda HVAC systems that use an R134A refrigerant setup. As a TXV, it meters refrigerant entering the evaporator based on system demand, which is critical for maintaining proper cooling balance. This part is listed for Mazda 626 and Mazda MX-6 models from 1993-1997, Mazda 323 from 1991-1995, Mazda Protege from 1990-1994, and Mazda MX-3 from 1992-1993. The brass valve body and 8.0 super heat specification make it a direct-fit service part for the listed applications.
This part cross-references Dorman - HELP 38663 for the same application.
Common Issues This Part May Address
- Weak or inconsistent cabin cooling
- Incorrect refrigerant metering at the evaporator
- Frosting or temperature instability in the A/C system
- Restricted refrigerant flow caused by a worn expansion valve
- Service replacement for Mazda A/C repair work
Installation Notes and Tips
Verify the vehicle’s refrigerant type before installation; this valve is specified for R134A systems. Confirm the application by year and model before service, especially on Mazda 626, MX-6, 323, Protege, and MX-3 vehicles. Proper A/C service procedures, evacuation, and recharge are required after replacement to restore system operation.
Quality Assurance
Four Seasons supplies HVAC service components for automotive air conditioning repair, and this expansion valve is built to match the listed application requirements for fit and refrigerant specification.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1997 | Mazda | 626 | N/A | Expansion Valve |
| 1997 | Mazda | MX-6 | N/A | Expansion Valve |
| 1996 | Mazda | 626 | N/A | Expansion Valve |
| 1996 | Mazda | MX-6 | N/A | Expansion Valve |
| 1995 | Mazda | 323 | N/A | Expansion Valve |
| 1995 | Mazda | 626 | N/A | Expansion Valve |
| 1995 | Mazda | MX-6 | N/A | Expansion Valve |
| 1994 | Mazda | 323 | N/A | Expansion Valve |
| 1994 | Mazda | 626 | N/A | Expansion Valve |
| 1994 | Mazda | MX-6 | N/A | Expansion Valve |
| 1994 | Mazda | Protege | N/A | Expansion Valve |
| 1993 | Mazda | 323 | N/A | Expansion Valve |
| 1993 | Mazda | 626 | N/A | Expansion Valve |
| 1993 | Mazda | MX-3 | N/A | Expansion Valve |
| 1993 | Mazda | MX-6 | N/A | Expansion Valve |
| 1993 | Mazda | Protege | N/A | Expansion Valve |
| 1992 | Mazda | 323 | N/A | Expansion Valve |
| 1992 | Mazda | MX-3 | N/A | Expansion Valve |
| 1992 | Mazda | Protege | N/A | Expansion Valve |
| 1991 | Mazda | 323 | N/A | Expansion Valve |
| 1991 | Mazda | Protege | N/A | Expansion Valve |
| 1990 | Mazda | Protege | N/A | Expansion Valve |
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