Four Seasons 3603NK A/C Compressor and Component Kit

Complete A/C Kit for FS18 Applications

Four Seasons 3603NK is a complete air conditioning kit built for Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis applications with the FS18 compressor. It combines the major A/C service components needed for a full compressor replacement in one package, including a new compressor, accumulator, orifice tube, oil, and O-rings.

The Four Seasons Complete A/C Kit line is organized for repair jobs that call for matched components rather than a single replacement part. This 3603NK kit is set up for R134a systems and includes the core pieces needed to restore refrigerant flow and system sealing on the listed vehicles.

• Four Seasons part number 3603NK
• Complete A/C kit with new compressor
• Includes compressor oil
• Orifice tube expansion device with .057 in. orange standard tube
• Accumulator with female springlock inlet and outlet fittings
• Gaskets / seals included
• Refrigerant type: R134a
• Limited lifetime warranty

Detailed Product Overview

This A/C compressor kit includes 68185 new compressor, 83044 accumulator, 38639 orifice tube, 59007 oil, and O-rings. The compressor oil is included, and the kit uses an orifice tube expansion device to match the listed HVAC configuration. The accumulator measures 3.000 inches in diameter and 8.000 inches in length, with 0.750 inch female springlock inlet and outlet fittings.

Fits 2006-2011 Ford Crown Victoria, N/A. Fits 2006-2011 Lincoln Town Car, N/A. Fits 2006-2011 Mercury Grand Marquis, N/A. This part cross-references 520235 and MK1086 for the same application.

Common Repair Uses

• Restoring cooling performance after compressor failure
• Replacing a noisy, seized, or weak A/C compressor
• Addressing refrigerant loss tied to worn seals or O-rings
• Correcting poor system operation caused by a restricted orifice tube
• Refreshing the accumulator during a full A/C service

Installation Notes and Tips

Verify the vehicle uses the FS18 compressor before ordering. Replace the accumulator and orifice tube during compressor service, and follow proper evacuation, oil balancing, and recharge procedures for R134a systems. Inspect all springlock connections and sealing surfaces before assembly to help ensure a clean, leak-free installation.

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. The included components are matched for the listed applications to support a complete A/C repair on 2006-2011 Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis models.