Four Seasons 39902 A/C Expansion Valve

Reliable Four Seasons Expansion Valve for Automotive A/C Systems

The Four Seasons Expansion Valve 39902 is engineered to regulate refrigerant flow in automotive air conditioning systems using R134a refrigerant. Designed with durable aluminum construction and a block-type style, this valve ensures consistent performance and compatibility with various vehicle makes and models requiring precise A/C flow control.

• Constructed from lightweight, corrosion-resistant aluminum
• Compatible with R134a refrigerant systems
• Block-type expansion valve design for efficient refrigerant metering
• Two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with sealing washer style
• Thread diameters: No. 12 for suction fittings, No. 6 and No. 8 for liquid fittings
• Meets or exceeds OEM specifications
• Designed without a solenoid and does not include a switch
• Superheat rating of -4.0 for optimal system performance
• Rated for 1.5 tonnage A/C systems

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve product line focuses on delivering reliable A/C flow restrictors that meet or exceed original equipment manufacturer standards. The 39902 model exemplifies this commitment by providing a block-type expansion valve designed for precise refrigerant control in R134a systems. This product line supports a range of automotive HVAC applications, ensuring compatibility and durability across various vehicle platforms.

Detailed Product Description

The Four Seasons Expansion Valve 39902 is crafted from aluminum to resist corrosion and withstand the demands of automotive air conditioning systems. Its block-type design allows for accurate metering of refrigerant, which is critical for maintaining proper superheat and system efficiency. The valve features female fittings on both suction and liquid sides, each equipped with sealing washers to prevent leaks. Thread diameters are standardized at No. 12 for suction fittings and No. 6 and No. 8 for liquid fittings, facilitating straightforward integration into compatible A/C lines. With two mounting holes, the valve can be securely fastened to the vehicle’s HVAC assembly. This expansion valve is designed without a solenoid and does not include a switch, aligning with specific system requirements. It is rated for 1.5 tonnage systems and supports R134a refrigerant, making it suitable for many mid-sized passenger vehicles.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain optimal cooling performance
• Prevents compressor damage caused by improper refrigerant metering
• Reduces A/C system freeze-ups due to incorrect superheat levels
• Helps restore proper air conditioning function in vehicles with OEM valve failures
• Supports efficient heat exchange by controlling refrigerant expansion

Installation Notes and Tips

• Ensure compatibility with vehicle refrigerant type R134a before installation
• Verify thread sizes and fitting genders match existing A/C lines
• Use proper sealing washers to prevent refrigerant leaks at all connections
• Secure valve using the two mounting holes to avoid vibration-related issues
• Check system superheat settings after installation to confirm correct operation

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39902 meets or exceeds OEM standards for fit, form, and function. Manufactured with precision aluminum components and tested for durability, this valve is designed to provide reliable service in automotive A/C systems. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality assurance protocols to ensure customer satisfaction and long-term performance.