Four Seasons 5445NK A/C Compressor and Component Kit

Complete A/C Kit for 2004 Ford F-150

Restore air conditioning performance on a 2004 Ford F-150 with this Four Seasons Complete A/C Kit. Part number 5445NK includes the major components needed for a full compressor-side service, with a new compressor, accumulator, orifice tube, oil, and O-rings.

Built for vehicles using an FS10 compressor and factory air, this kit is also listed for 2004 Ford F-150 applications with a 6-groove compressor pulley and blue orifice tube. It is configured for R134a refrigerant and includes the sealing components needed for a proper A/C system refresh.

Key Features

• Four Seasons Complete A/C Kit, part number 5445NK
• Includes a new compressor, accumulator, orifice tube, oil, and O-rings
• Configured for R134a refrigerant systems
• Uses a standard blue orifice tube with .067 in. diameter
• Accumulator features P-nut inlet fitting and male springlock outlet fitting
• Limited lifetime warranty

Product Details

The Four Seasons Complete A/C Kit line is built to simplify compressor-side air conditioning service by grouping the core replacement parts needed for a system repair. This 5445NK kit is specified for 2004 Ford F-150 models with FS10 compressor applications and factory air, including versions with a 6-groove pulley. The accumulator measures 3.500 in. in diameter and 9.000 in. in length, while the included blue orifice tube uses a standard style and .067 in. opening.

This part cross-references Monroe Shocks & Struts (e.g., 520571, MK1048) for the same application.

What It Helps Address

• Weak or inconsistent cabin cooling
• Compressor failure requiring a full A/C service
• Restricted refrigerant flow through the orifice tube
• Moisture or contamination in the A/C system
• Leaking seals at service points in the air conditioning circuit

Installation Notes and Tips

• Verify FS10 compressor fitment before ordering for your 2004 Ford F-150.
• Confirm factory air configuration and pulley setup match the listed application.
• Replace the accumulator and orifice tube during compressor service to support proper system operation.
• Flush the system as needed before installing the new compressor and charging with R134a refrigerant.
• Use the included O-rings and oil during reassembly to help ensure correct sealing and lubrication.

Quality Assurance

Four Seasons backs this Complete A/C Kit with a limited lifetime warranty. Part number 5445NK is built as a complete air conditioning kit with new compressor components for the listed 2004 Ford F-150 applications.