Four Seasons 38904 A/C Orifice Tube - Front or Rear

Four Seasons 38904 Orifice Tube

Four Seasons 38904 is an A/C orifice tube for HVAC flow control in vehicle air conditioning systems. With a 0.072 in. orifice diameter and white AAOT style, it serves as an expansion device for select Chevrolet, GMC, Ford, Audi, Volvo, and other applications across a wide model range.

Use this Four Seasons Orifice Tube when servicing an A/C system that calls for a fixed orifice design and the specified 0.072 in. opening. Part number 38904 is listed for front and N/A positions depending on the vehicle application, including severe-climate and automatic-adjusting notes in the fitment data.

Key Features

• Four Seasons Orifice Tube brand line for A/C flow restriction service
• Part number 38904
• 0.072 in. orifice diameter
• White AAOT style expansion device
• Fits select front and N/A applications across 1988-2023 model years
• Used in HVAC systems that specify an orifice tube rather than a thermal expansion valve

Detailed Description

Four Seasons 38904 is an A/C orifice tube used to meter refrigerant flow through the evaporator circuit. The white AAOT design and 0.072 in. opening make it a direct-match service part for many vehicles that use an orifice-tube HVAC layout, including Chevrolet Express 2500, GMC Savana 3500, Ford Ranger, Ford F-150, Audi A6, and Volvo S40 applications listed in the fitment data. This part cross-references UAC EX7000C for the same application.

The Four Seasons Orifice Tube line is built for replacement work where the original system calls for a specific flow restrictor size. For fitment-based searches, this part is commonly referenced for A/C orifice tube replacement on Chevrolet Express and GMC Savana vans, Ford truck and SUV platforms, and several Audi and Volvo models.

What It Helps Address

• Incorrect refrigerant metering through the evaporator circuit
• Loss of cooling performance caused by a worn or restricted orifice tube
• A/C service repairs on vehicles that use an orifice-tube system
• Fitment-specific replacement needs for Chevrolet Express, GMC Savana, Ford Ranger, and similar applications
• Severe-climate A/C service where the catalog calls for an automatic-adjusting orifice tube

Installation Notes and Tips

• Verify the vehicle’s A/C system uses an orifice tube before ordering.
• Match the listed application notes, including front or N/A position details.
• Inspect the system for contamination before installing a new orifice tube.
• Confirm the specified orifice diameter and style against the original part.
• Follow the vehicle service procedure for refrigerant recovery and system evacuation.

Quality Assurance

Four Seasons 38904 is cataloged as an HVAC expansion device with application-specific fitment data for 1988-2023 vehicles. The part number 38904 is supported by interchange references and detailed vehicle listings to help confirm the correct A/C orifice tube for the application.