Four Seasons 66646 A/C Discharge and Liquid Line

Reliable A/C Discharge and Liquid Line for Buick Encore and Chevrolet Trax

The Four Seasons Hose Assembly part number 66646 is designed to maintain optimal air conditioning performance in Buick Encore and Chevrolet Trax models. Engineered for high-pressure R134a refrigerant systems, this hose assembly ensures efficient refrigerant flow and system reliability.

Key Features of Four Seasons Hose Assembly 66646

• Constructed with durable aluminum and rubber materials for long-lasting performance
• Compatible with R134a refrigerant type and high-pressure A/C systems
• Includes gasket and slim line sealing washers (O-Rings) for secure connections
• Equipped with a P-nut fitting on both discharge and suction ends
• Features a switch service port with M10x1.25 size and one switch port included
• Comes with a bracket and manifold for proper mounting and system integration
• OE replacement part ensuring direct fit and function

Detailed Description of Four Seasons Hose Assembly

This Hose Assembly from Four Seasons is part of the Hose Assembly product line, which focuses on providing reliable and precise HVAC hose and pipe solutions. The assembly combines aluminum and rubber components to withstand the demands of high-pressure air conditioning systems using R134a refrigerant. It includes multiple O-rings—two slim line sealing washers [24401], two slimline washers [24402], and one green O-ring [24606]—to ensure leak-free connections. The P-nut fittings on both discharge and suction ends facilitate secure attachment to the vehicle’s A/C system. Additionally, the included bracket and manifold support proper installation and system stability. This assembly does not include a muffler or service port but features a switch service port for system monitoring.

Applications and Common Issues Addressed

• Replacement of worn or damaged A/C discharge and liquid lines in Buick Encore and Chevrolet Trax
• Resolution of refrigerant leaks caused by degraded seals or fittings
• Restoration of proper refrigerant flow in high-pressure R134a systems
• Correction of system pressure loss due to faulty hose assemblies
• Improvement of A/C system reliability and performance through OE-quality parts

Installation Notes and Tips

Ensure the vehicle’s A/C system is fully depressurized before removing the old hose assembly. Verify that all O-rings are properly seated and lubricated with refrigerant oil to prevent leaks. Use the included bracket and manifold to secure the hose assembly firmly in place. Confirm that the switch service port is correctly connected and tightened to the specified torque. After installation, perform a system pressure test to check for leaks and proper operation.

Quality Assurance and Warranty

Four Seasons Hose Assembly 66646 is an OE replacement part designed to meet or exceed original equipment specifications. Manufactured with high-quality materials and precision engineering, it supports reliable HVAC system performance. Warranty coverage details should be confirmed with the product documentation or supplier.