Four Seasons 4343NK A/C Compressor and Component Kit

Complete A/C Kit for Ram HD Applications

Four Seasons 4343NK is a complete air conditioning kit with a new compressor for select Dodge Ram heavy-duty trucks. It is built for 2006-2009 Dodge Ram 2500 and 2006-2007 Dodge Ram 3500 applications equipped with an HS18 compressor, and it includes the major components needed to restore the A/C system.

The Four Seasons Complete A/C Kit line is organized as a full-system replacement solution, combining the compressor, accumulator, liquid line with orifice, compressor oil, and O-rings in one package for service work on R134a systems.

Key Features

• Four Seasons 4343NK complete A/C compressor kit
• Includes a new compressor, accumulator, liquid line with orifice, oil, and O-rings
• Uses R134a refrigerant
• Compressor oil included
• Gaskets and seals included
• Receiver drier/accumulator with male springlock inlet and outlet fittings
• Limited lifetime warranty

Detailed Product Overview

This kit is designed for Dodge Ram 2500 and Dodge Ram 3500 trucks that use the HS18 compressor configuration. The included accumulator measures 3.500 inches in diameter and 7.500 inches in length, with 0.625 inch male springlock inlet and outlet fittings. The liquid line with orifice and the included compressor oil support a complete A/C system refresh when replacing worn or failed components. Part number 4343NK is also referenced under interchange number 520230 for the same application.

Common A/C Problems This Kit Addresses

• Loss of cooling performance from a worn or failed compressor
• Contaminated or aging refrigerant circuit components
• Moisture or debris issues in the accumulator and liquid line
• Leaks at seals, O-rings, or springlock connections
• System service needs after compressor replacement on Ram 2500 and Ram 3500 trucks

Installation Notes and Tips

Verify HS18 compressor fitment before ordering. Replace the accumulator and related sealing components during service, and confirm the system is evacuated, leak-checked, and charged with the correct R134a refrigerant amount after installation. Follow the vehicle service procedure for oil balancing and component replacement on 2006-2009 Dodge Ram 2500 and 2006-2007 Dodge Ram 3500 models.

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. Part number 4343NK is built as a complete A/C service solution for select Dodge Ram 2500 and Ram 3500 applications, with the major replacement components grouped for a more efficient repair.