Four Seasons 39553 A/C Expansion Valve

Reliable A/C Expansion Valve for Mercedes-Benz Models

The Four Seasons Expansion Valve 39553 is engineered to regulate refrigerant flow in your vehicle's air conditioning system. Designed specifically for select Mercedes-Benz models, this aluminum block-type valve ensures efficient cooling performance with R134a refrigerant compatibility.

• Constructed from durable aluminum material for corrosion resistance
• 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 style
• Meets or exceeds OEM specifications for reliable performance

Product Details and Specifications

This Four Seasons Expansion Valve 39553 features a block type design without a solenoid, optimized for precise refrigerant flow control. The valve includes female suction inlet and outlet fittings sized at No. 12 with non-threaded connections, and female liquid inlet and outlet fittings sized No. 6 and No. 8 respectively, both utilizing sealing washers for leak prevention. The liquid inlet measures 0.34 inches (8.6 mm) and the outlet 0.46 inches (11.8 mm), while the suction inlet size is 0.700 inches (17.7 mm). This part is engineered to fit Mercedes-Benz vehicles such as the C63 AMG, C63 AMG S, C200, C250, C300, C350e, C400, C450 AMG, and GLC300 models.

About the Four Seasons Expansion Valve Product Line

The Expansion Valve line from Four Seasons focuses on delivering precise refrigerant metering components for automotive HVAC systems. This product line is designed to meet or exceed OEM standards, providing reliable temperature regulation and system efficiency. The 39553 valve is part of this line, offering a block type valve solution compatible with R134a refrigerant systems commonly found in Mercedes-Benz vehicles.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain optimal A/C system pressure
• Prevents compressor damage caused by improper refrigerant metering
• Resolves inconsistent cabin cooling or fluctuating temperatures
• Eliminates refrigerant leaks due to worn or damaged expansion valves
• Supports efficient operation of R134a-based air conditioning systems

Installation Notes and Tips

Ensure the vehicle’s A/C system is fully evacuated and free of contaminants before installing the expansion valve. Use proper sealing washers on all liquid inlet and outlet fittings to prevent leaks. Verify compatibility with your specific Mercedes-Benz model and refrigerant type (R134a). Tighten mounting bolts securely using the two provided mounting holes, and avoid overtightening to prevent damage to the aluminum valve body.

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39553 meets or exceeds OEM quality standards, providing dependable performance for your vehicle’s HVAC system. Manufactured from corrosion-resistant aluminum, this valve is built for durability and long service life. Please refer to Four Seasons’ warranty policy for coverage details.