Four Seasons 39388 A/C Expansion Valve TXV Thermostatic Expansion Valve

The Four Seasons 39388 is a direct-fit A/C thermostatic expansion valve (TXV) designed as a precision replacement for the original equipment unit. The expansion valve is a critical component of the vehicle's air conditioning system, responsible for metering refrigerant flow into the evaporator core and regulating system pressure to maintain consistent, efficient cooling performance.

Key Features:

• OE-matched specifications — engineered to meet or exceed original equipment fit, form, and function requirements
• Thermostatic expansion valve (TXV) design — precisely controls refrigerant flow based on evaporator outlet temperature for optimal A/C efficiency
• Unique TXV specification — calibrated for the correct tonnage, superheat, and maximum operating pressure (MOP) for the specific application
• High-quality components — built for long-lasting, reliable performance in demanding climates
• Tested and validated — inspected by engineers with decades of automotive air conditioning experience
• R-134a compatible — designed for use with standard automotive refrigerant systems

Four Seasons is the largest aftermarket climate control parts supplier in the automotive industry. A properly functioning expansion valve is essential to A/C system health — a misapplied or worn valve can cause poor cooling, compressor damage, and refrigerant inefficiency. The 39388 restores proper refrigerant metering and system balance.