Four Seasons 66229 A/C Expansion Valve Thermostatic Expansion Valve TXV

The Four Seasons 66229 is a direct-fit replacement A/C Expansion Valve (TXV — Thermostatic Expansion Valve) designed to restore proper refrigerant flow and cooling performance in your vehicle's air conditioning system. As a critical component of the A/C circuit, the expansion valve meters the flow of liquid refrigerant into the evaporator, regulating pressure and temperature to ensure efficient heat absorption and consistent cabin comfort.

Key Features:

• Engineered to meet or exceed OE fit, form, and function requirements
• Calibrated to application-specific superheat, tonnage, and maximum operating pressure (MOP) specifications
• High-quality internal components for long-lasting, reliable performance
• Includes application-specific O-rings, gaskets, and seals for a complete installation
• Developed using in-house R&D with the latest software and precision measuring equipment
• Tested and validated by engineers with extensive automotive air conditioning experience

Four Seasons is the largest aftermarket mobile climate control parts supplier in the industry and the largest compressor remanufacturer in the world. Every expansion valve is calibrated for optimum cabin comfort and backed by decades of HVAC engineering expertise.