Four Seasons 20077SK A/C Compressor Replacement Service Kit

Four Seasons A/C Service Kit for Mitsubishi

Restore key air conditioning service components with the Four Seasons 20077SK A/C Installer Kit. This A/C compressor replacement service kit includes the parts commonly needed when servicing an R134a system, with fitment for select Mitsubishi Lancer and Mitsubishi Outlander models.

Key Features

• Brand: Four Seasons A/C Installer Kits
• Part number: 20077SK
• Includes filter drier, expansion valve, compressor oil, O-ring/gasket pack, and cap and valve kit
• PAG Oil / 46 included
• R134a refrigerant system application
• Block-type expansion device with insert O-ring inlet and outlet connections
• Receiver drier/accumulator features pad-mount inlet and outlet fittings
• Limited lifetime warranty

Detailed Description

The Four Seasons 20077SK is an A/C compressor replacement service kit built around the service parts needed for a proper HVAC repair. It includes a filter drier, expansion valve, compressor oil, an O-ring/gasket pack, and a cap and valve kit, along with PAG Oil / 46 for R134a systems. The kit is listed for 2002-2006 Mitsubishi Lancer and 2003-2006 Mitsubishi Outlander applications, making it a direct-fit service solution for those vehicles. Four Seasons 20077SK is part of the A/C Installer Kits line, focused on grouped service components for compressor-related repairs.

This part cross-references Monroe Shocks & Struts (e.g., 550485, MUK20210) for the same application.

What It Helps Address

• Loss of cooling performance after compressor service
• Contaminated or moisture-affected A/C system components
• Expansion valve restriction or inconsistent refrigerant flow
• Leaking seals or O-rings at service connections
• Need for matched service parts during R134a A/C repair

Installation Notes and Tips

Verify the vehicle’s refrigerant type before installation; this kit is specified for R134a systems. Replace the filter drier and expansion valve during compressor-related service, and confirm the pad-mount receiver drier/accumulator connection style matches the vehicle. Always follow factory service procedures for evacuation, leak checking, and refrigerant charging.

Quality Assurance

Four Seasons backs this kit with a limited lifetime warranty. The included service components are specified for the listed Mitsubishi Lancer and Mitsubishi Outlander applications, helping support a proper HVAC repair using the correct compressor oil and sealing components.