Four Seasons 39645 A/C Expansion Valve

Reliable A/C Expansion Valve for Chevrolet and GMC Trucks

The Four Seasons Expansion Valve 39645 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for Chevrolet and GMC models, this aluminum block-type valve ensures efficient cooling performance with compatibility for R134a and R1234yf refrigerants.

• Constructed from durable aluminum material
• Compatible with R134a and R1234yf refrigerants
• Block type design without solenoid for precise flow control
• Sealing washer style for liquid and suction inlet/outlet connections
• Meets or exceeds OEM specifications for reliable fit and function
• Designed for Chevrolet and GMC trucks including Silverado and Sierra series

Four Seasons Expansion Valve Product Line Overview

The Expansion Valve product line by Four Seasons focuses on delivering precise refrigerant flow control components for automotive HVAC systems. This line includes block-type valves like part number 39645, engineered to maintain optimal superheat levels and ensure consistent air conditioning performance. The valves are designed to meet OEM standards, providing dependable operation for various truck models.

Detailed Product Description and Specifications

The Four Seasons Expansion Valve 39645 features a robust aluminum construction with an aluminum color finish, suitable for heavy-duty use. It supports both R134a and R1234yf refrigerants, making it compatible with modern and legacy A/C systems. The valve is a block type without a solenoid, designed to regulate refrigerant flow precisely. It includes sealing washer style connections for liquid inlet (No. 6), liquid outlet (No. 8), suction inlet (No. 10), and suction outlet (No. 12) ports, ensuring secure and leak-free installation. The valve is calibrated for a superheat of -7.000 and supports a 1-ton tonnage capacity, aligning with the cooling requirements of Chevrolet and GMC trucks such as the Silverado 1500, Sierra 2500 HD, and others.

Common Applications and Issues Addressed

• Restores proper refrigerant flow in Chevrolet Silverado and GMC Sierra A/C systems
• Resolves inconsistent cabin cooling or fluctuating air temperatures
• Eliminates issues related to refrigerant overfeeding or underfeeding
• Addresses A/C system inefficiencies caused by faulty expansion valves
• Prevents compressor damage by maintaining correct superheat levels

Installation Notes and Tips

When installing the Four Seasons Expansion Valve 39645, ensure all sealing washers are properly seated to prevent refrigerant leaks. This valve is designed to replace OEM parts directly on Chevrolet and GMC trucks listed in the fitment. It is recommended to evacuate and recharge the A/C system with the appropriate refrigerant type (R134a or R1234yf) after installation. Professional installation is advised to maintain system integrity and performance.

Quality Assurance and Warranty

Four Seasons Expansion Valve 39645 meets or exceeds OEM specifications, ensuring reliable performance and durability. Manufactured with high-quality aluminum and precision engineering, this valve is built to withstand demanding operating conditions. Warranty details should be confirmed with the product documentation or supplier to ensure coverage.