Four Seasons 39681 A/C Expansion Valve - Front

Reliable A/C Expansion Valve for Lexus RX Models

The Four Seasons Expansion Valve 39681 is engineered to regulate refrigerant flow precisely in your Lexus RX350, RX350L, RX450h, and RX450hL models. Designed with durable aluminum and compatible with R134a refrigerant, this block-type valve ensures efficient air conditioning system performance.

• Constructed from lightweight, corrosion-resistant aluminum
• Compatible with R134a refrigerant systems
• Block type design without solenoid for consistent flow control
• O-ring style liquid and suction inlet/outlet connections for secure sealing
• Meets or exceeds OEM specifications for reliable fit and function
• Includes mounting hardware for straightforward installation
• Designed for 1-ton A/C systems with a superheat rating of -6.000

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve line focuses on delivering precise refrigerant metering components that maintain optimal air conditioning system efficiency. The 39681 model exemplifies this with its block-type design and compatibility with common refrigerants like R134a. This product line is tailored to meet or exceed OEM standards, providing dependable performance for specific vehicle applications such as the Lexus RX series.

Detailed Product Description

This A/C expansion valve features a block-type configuration constructed from aluminum, offering durability and resistance to corrosion. It is designed for use with R134a refrigerant, the standard for many modern automotive air conditioning systems. The valve includes O-ring style liquid inlet and outlet connections (No. 6 and No. 10 sizes respectively) and suction inlet and outlet connections (both No. 12 size), ensuring a secure and leak-free fit. The valve operates without a solenoid, simplifying the design and reducing potential failure points. Its superheat rating of -6.000 and 1-ton tonnage rating make it suitable for the cooling demands of Lexus RX350, RX350L, RX450h, and RX450hL models.

Common Issues Addressed by This Expansion Valve

• Inconsistent or insufficient cooling performance in Lexus RX A/C systems
• Refrigerant flow irregularities causing compressor strain or failure
• Leaks or poor sealing at liquid or suction connections
• Failure of original expansion valve components due to wear or corrosion
• Air conditioning system inefficiency leading to increased energy consumption

Installation Notes and Tips

Ensure the A/C system is properly evacuated and free of contaminants before installing the Four Seasons Expansion Valve 39681. Verify that all O-rings are in good condition and properly seated to prevent leaks. This valve is designed to replace OEM parts directly on Lexus RX350, RX350L, RX450h, and RX450hL models, so confirm compatibility before installation. Follow manufacturer torque specifications for mounting hardware to avoid damage.

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39681 meets or exceeds OEM standards, providing reliable performance and durability. Manufactured with precision aluminum components and tested for compatibility with R134a refrigerant, this valve supports consistent A/C system operation. Warranty details should be confirmed with the product documentation or supplier to ensure coverage.