Four Seasons 3970NK A/C Compressor and Component Kit - Front

Complete A/C Kit for Ford E-Series

Restore front air conditioning performance with the Four Seasons Complete A/C Kit 3970NK. This kit combines the major replacement components needed for a Ford E-150, E-250, E-350 Super Duty, and Econoline front A/C system service, including a new compressor, accumulator, orifice tube, oil, and O-rings.

Built for R134a systems and OE-design compressor applications, this Four Seasons Complete A/C Kit is a direct-fit service solution for 2002-2006 Ford E-Series vans with front HVAC and no rear A/C. The 3970NK kit is a practical choice when replacing a worn compressor and related A/C components at the same time.

Key Features

• Four Seasons Complete A/C Kit, part number 3970NK
• Includes a new compressor, accumulator, orifice tube, compressor oil, and O-rings
• Uses an orifice tube expansion device for R134a refrigerant systems
• Accumulator features female O-ring inlet and outlet fittings
• OE-design compressor application for front HVAC service
• Limited lifetime warranty

Product Details

The Four Seasons Complete A/C Kit line is built to simplify major air conditioning repairs by grouping the compressor and supporting service parts needed for a proper system refresh. Part number 3970NK includes compressor oil, gasket and seal components, and an orifice tube sized for the listed Ford applications. The accumulator dimensions and female O-ring fittings match the specified front A/C configurations used on select Ford E-Series vans.

Compatible With 2002-2006 Ford E-150, front; 2002-2006 Ford E-250, front; 2002-2006 Ford E-350 Super Duty, front; and 2002-2006 Ford Econoline, front, with scroll compressor or FS20 compressor depending on model year and configuration, and without rear A/C. This part cross-references Raybestos Brakes MK1091 for the same application.

Common A/C Problems This Kit Can Address

• Weak or inconsistent cabin cooling from a worn compressor
• Noisy compressor operation or compressor seizure
• Restricted refrigerant flow caused by a failing orifice tube
• Loss of system efficiency from aged accumulator and seals
• Service contamination after compressor replacement

Installation Notes and Tips

Verify the vehicle’s compressor style and rear A/C configuration before ordering. This kit is listed for front HVAC systems only and requires R134a refrigerant service. Replace the accumulator, orifice tube, and O-rings during compressor service, and follow proper evacuation, oil balancing, and recharge procedures after installation.

Quality Assurance

Four Seasons backs this Complete A/C Kit 3970NK with a limited lifetime warranty. The kit is assembled for OE-design compressor applications and includes the core service components needed for a complete front A/C repair on the listed Ford E-Series vehicles.