Four Seasons 38848 A/C Expansion Valve - Rear

Four Seasons 38848 Expansion Valve

The Four Seasons 38848 expansion valve is a block-type A/C flow restrictor built for R134A systems. It uses an aluminum body and meets or exceeds OEM requirements for direct replacement service on select Dodge trucks and vans.

Four Seasons Expansion Valve line parts are built for HVAC service work where accurate refrigerant metering matters. This 38848 valve is specified as a w/o solenoid design with a 7.5 superheat setting and fitment coverage for multiple Dodge Dakota, D150, D250, D350, Ramcharger, W150, W250, and W350 applications.

Key Features

• Part number: 38848
• Four Seasons Expansion Valve line
• Block type A/C expansion valve
• Aluminum construction
• R134A refrigerant type
• Meets or exceeds OEM specifications
• Designed without solenoid
• 2 mounting holes
• Female inlet and outlet fittings
• Fits select Dodge HVAC systems, including rear applications on 1991 B150, B250, and B350

Detailed Description

The Four Seasons 38848 expansion valve regulates refrigerant flow into the evaporator to help maintain proper A/C system performance. Its block-style design, aluminum construction, and O-ring sealing interfaces are suited for service on factory-style R134A HVAC systems. This part cross-references UAC EX9417C for the same application.

Fitment coverage includes 1989-1996 Dodge Dakota, 1979-1985 and 1990-1993 Dodge D150, 1981-1985 and 1990-1993 Dodge D250, 1981-1985 and 1990-1993 Dodge D350, 1979-1985 and 1990-1993 Dodge Ramcharger, 1979-1985 and 1990-1993 Dodge W150, 1981-1985 and 1990-1993 Dodge W250, and 1981-1985 and 1990-1993 Dodge W350. It also fits 1991 Dodge B150, B250, and B350 rear HVAC applications, plus 1979-1982 Dodge D50 with a block style valve and 1979-1980 Dodge D200, D300, W200, and W300.

What It Helps Fix

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• Frosting or temperature swings in the A/C system
• Expansion valve leakage or restriction issues
• HVAC performance loss on Dodge truck and van systems

Installation Notes and Tips

Verify the vehicle uses an R134A system and confirm the block-type valve layout before installation. Match the inlet and outlet fitting style, thread diameter, and O-ring sealing surfaces to the original component. For best results, inspect the surrounding A/C components, replace worn seals as needed, evacuate the system properly, and recharge to the correct specification after service.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, making it a direct-fit service part for the confirmed Dodge applications above. Part number 38848 is built for HVAC repair work where factory-style fit and refrigerant control are required.