Four Seasons 39018 A/C Expansion Valve - Front

Reliable A/C Expansion Valve for Jeep Commander and Grand Cherokee

The Four Seasons Expansion Valve 39018 is engineered to regulate refrigerant flow in your Jeep Commander or Grand Cherokee's air conditioning system. Designed with durable aluminum and compatible with R134a refrigerant, this block-type valve ensures precise temperature control and efficient HVAC performance.

• Constructed from corrosion-resistant aluminum material
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with sealing washer and insert o-ring styles
• Meets or exceeds OEM specifications for Jeep Commander and Grand Cherokee models

Four Seasons Expansion Valve Product Line Overview

The Expansion Valve product line by Four Seasons focuses on delivering reliable A/C flow restrictors that maintain optimal refrigerant metering. This line is designed to meet OEM standards, providing consistent performance and durability. The 39018 part number is part of this line, offering a block-type valve that integrates seamlessly with Jeep HVAC systems using R134a refrigerant.

Detailed Product Description and Specifications

The Four Seasons 39018 A/C Expansion Valve is crafted from aluminum, providing strength and resistance to corrosion. It features a block-type design with two mounting holes for stable attachment. The valve includes female suction inlet and outlet fittings with No. 10 and No. 12 thread diameters respectively, both non-threaded for proper sealing. Liquid inlet and outlet fittings are also female, sized No. 6 and No. 8, using sealing washers and insert o-rings to ensure leak-free connections. The liquid inlet size measures 0.34 inches (8.6 mm), while the liquid outlet size is 0.54 inches (13.6 mm). This valve is specifically designed for use with R134a refrigerant, common in Jeep Commander and Grand Cherokee A/C systems.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain consistent cabin temperature
• Prevents A/C system freezing or overheating
• Resolves issues with fluctuating air conditioning performance
• Replaces faulty or worn expansion valves in Jeep Commander and Grand Cherokee models
• Helps restore proper pressure balance within the HVAC system

Installation Notes and Tips

Ensure the A/C system is fully evacuated and depressurized before installation. The Four Seasons 39018 expansion valve mounts securely using two mounting holes. Use appropriate sealing washers and o-rings included or specified to prevent leaks. Verify compatibility with R134a refrigerant systems and confirm fitment with Jeep Commander or Grand Cherokee models. Proper torque specifications should be followed to avoid damage to fittings.

Quality Assurance and Warranty

This Four Seasons Expansion Valve 39018 meets or exceeds OEM quality standards for Jeep HVAC components. Manufactured with precision aluminum and designed for durability, it provides reliable service life. The product includes slim line sealing washers and slimline washers to ensure a secure seal. Warranty coverage details should be confirmed with the product documentation or manufacturer.