Four Seasons 39704 A/C Expansion Valve

Product Overview

Four Seasons 39704 is a block-type A/C expansion valve for R1234yf systems. It is built for Mazda applications and uses O-ring connections for the liquid and suction lines, with no solenoid.

Use this Four Seasons expansion valve when servicing Mazda 3 and Mazda CX-30 air conditioning systems that call for part number 39704. The design is focused on refrigerant metering and stable evaporator performance in R1234yf-equipped HVAC systems.

Key Features

• Block-type A/C expansion valve for refrigerant flow control
• Designed for R1234yf refrigerant systems
• O-ring inlet and outlet connections for liquid and suction lines
• No solenoid configuration
• Superheat setting: -2.5
• Rated for 1.000 tonnage

Detailed Description

Four Seasons 39704 is an A/C expansion valve engineered for precise refrigerant metering in compatible Mazda HVAC systems. The block-style body, O-ring line connections, and no-solenoid design make it a direct service part for R1234yf applications where the expansion valve must regulate refrigerant entering the evaporator. This part number, 39704, is listed for Mazda 3 and Mazda CX-30 coverage across the model years shown in the fitment data.

Four Seasons' Expansion Valve line draws on the brand's mobile A/C experience and testing practices to support consistent operation in service applications. If you are replacing a worn or restricted valve on a Mazda 3 or Mazda CX-30, part number 39704 provides the specified refrigerant type and connection style for the listed vehicles.

What It Is Used For

• Restoring proper refrigerant metering through the evaporator circuit
• Addressing weak or inconsistent cabin cooling
• Replacing a valve with restricted flow or internal wear
• Correcting A/C performance issues in R1234yf systems
• Servicing Mazda HVAC systems that specify this valve design

Installation Notes and Tips

Verify refrigerant type, line sizes, and connection style before installation. This valve uses O-ring fittings and is specified without a solenoid. Follow the vehicle service procedure for evacuation, component replacement, and system recharge after installation. Fitment includes Mazda 3 and Mazda CX-30 applications listed for part number 39704.

Quality Assurance

Four Seasons states that its products are engineered and tested for long service life, backed by more than 50 years of mobile A/C experience. Part number 39704 is built to the listed application and refrigerant specifications for Mazda service work.