Four Seasons 39395 Block Type A/C Expansion Valve TXV Heavy Duty Truck

The Four Seasons 39395 is a block type thermostatic expansion valve (TXV) without solenoid, engineered as a direct replacement for heavy-duty truck A/C systems including Western Star, Mack, and Freightliner applications. Designed to precisely regulate refrigerant flow into the evaporator core, this TXV helps restore proper system cooling performance and maintain optimal cabin comfort.

Four Seasons utilizes an in-house research and development center with precise calibration equipment to ensure each expansion valve meets exacting performance standards. Every unit is calibrated for the specific tonnage, superheat, and maximum operating pressure (MOP) of its intended system, helping prevent common A/C performance issues caused by misapplied or low-quality valves.

Key Features:

• Block Type TXV — without solenoid; direct-fit replacement design
• OE-quality calibration — matched to system-specific tonnage, superheat, and MOP specs
• Includes hardware — O-rings, gaskets, and seals included for a complete installation
• Meets or exceeds OE standards — engineered for fit, form, and function
• Heavy-duty truck application — compatible with Western Star, Mack, and Freightliner platforms

Cross-Reference Part Numbers: Red Dot 71R8450, Red Dot RD599350, Red Dot RD599350P, Western Star RD599350, Western Star RD99350P, Mack 4379RD599350, Freightliner N83308251, NAPA Temp 917395, NAPA Temp A17395, Truck Air 121605A, Sunair EXV1083, Cooling Depot 39395, Carquest Premium AC T39395, Coolpoint 4506504, ABPN83308251.

As part of the SMP Temperature Control Division, Four Seasons is one of the industry's largest aftermarket mobile climate control suppliers, delivering products that are tested, inspected, and validated before shipment.