Four Seasons 66978 A/C Suction and Liquid Line Hose Assembly

Jeep Cherokee A/C Hose Assembly

Four Seasons 66978 is an A/C suction and liquid line hose assembly built with aluminum and rubber construction for reliable refrigerant flow. It is configured for R134a and R1234YF systems and includes the service port, switch service port, gasket or seal, and fittings needed for the application.

Compatible with 2019-2023 Jeep Cherokee models with R134a, this hose assembly supports the HVAC refrigerant circuit with an integrated IHX style layout. Four Seasons hose assemblies are engineered and tested for dependable operation, drawing on more than 50 years of mobile A/C experience.

Key Features

• Part number 66978 A/C suction and liquid line hose assembly
• Aluminum / rubber construction for HVAC refrigerant routing
• End 1: P-nut fitting; End 2: flange
• For R134A and R1234YF refrigerant systems
• Service port included with switch service port provision
• Gasket or seal included; fittings included
• Hose assembly with IHX style design
• Without bracket and without muffler

Product Details

This Four Seasons hose assembly is made for the suction and liquid line side of the air conditioning system, where proper sealing and refrigerant transfer are critical. The aluminum and rubber construction helps maintain the routing and connection points required for the Jeep Cherokee HVAC system, while the included service port and seal support a complete repair at the connection points. Part number 66978 is also referenced by Continental 66978 and cross-references 211889 and 68288353AA for the same application.

Common Problems This Part Can Address

• Refrigerant leaks at the A/C hose assembly
• Damaged or cracked hose sections
• Faulty service port connection points
• Loss of A/C performance from restricted refrigerant flow
• Failed sealing surfaces at the line ends

Installation Notes and Tips

Verify the vehicle uses the listed R134a configuration before installation. Inspect mating surfaces, replace worn seals as needed, and confirm the P-nut and flange connections are clean and properly aligned before tightening. After installation, evacuate and recharge the system according to the vehicle service procedure and check for leaks at the hose ends and service port.

Quality Assurance

Four Seasons engineers and tests its HVAC hose assemblies for long-term operation, backed by decades of mobile air conditioning experience. Part number 66978 is built to support a direct-replacement repair on compatible Jeep Cherokee applications.