Four Seasons 39901 A/C Expansion Valve

Reliable Four Seasons Expansion Valve for Automotive A/C Systems

The Four Seasons Expansion Valve 39901 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: suction inlet No. 10, suction outlet No. 12, liquid inlet No. 6, liquid outlet No. 8
• Meets or exceeds OEM specifications
• Designed without solenoid for straightforward operation
• Superheat rating of -4.0 for optimal system performance
• Compatible with 1.5 ton A/C systems

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve product line focuses on delivering precise refrigerant flow restrictors that meet or exceed original equipment manufacturer standards. The 39901 model exemplifies this line by offering a block-type valve constructed from aluminum, designed specifically for R134a refrigerant systems. This ensures reliable temperature regulation and efficient air conditioning performance across compatible vehicles.

Detailed Product Description

The Four Seasons Expansion Valve 39901 is a critical component in automotive HVAC systems, controlling the flow of refrigerant to maintain proper cooling efficiency. Its aluminum body provides durability and resistance to corrosion, while the block-type design allows for consistent refrigerant metering. The valve features female fittings on both suction and liquid sides, each equipped with sealing washers to prevent leaks. Thread diameters are precisely sized to fit specific vehicle A/C lines, ensuring a secure and leak-free connection. This valve is designed for 1.5 ton systems and operates without a solenoid, simplifying the system design and maintenance.

Common Applications and Issues Addressed

• Regulates refrigerant flow to prevent compressor damage
• Maintains proper superheat levels for efficient cooling
• Prevents refrigerant leaks with secure sealing washer fittings
• Replaces faulty or worn expansion valves causing inconsistent cabin temperatures
• Supports R134a refrigerant systems in compatible vehicle models

Installation Notes and Tips

Ensure the system is fully evacuated and free of contaminants before installing the Four Seasons Expansion Valve 39901. Verify thread sizes and fitting genders match the vehicle’s A/C lines to avoid leaks. Use appropriate torque specifications on mounting holes and fittings to maintain sealing integrity. Since this valve does not include a solenoid, confirm system compatibility prior to installation.

Quality Assurance and Warranty

This Four Seasons Expansion Valve meets or exceeds OEM standards for fit, form, and function. Manufactured with high-quality aluminum and precision engineering, it is designed for durability and reliable performance. Warranty information is provided by Four Seasons and should be referenced for specific coverage details.