Four Seasons 66820 A/C Suction and Liquid Line Hose Assembly

Reliable A/C Suction and Liquid Line Hose Assembly

The Four Seasons Hose Assembly 66820 is designed to restore proper function to the HVAC system of select Buick, Chevrolet, and GMC vehicles. Engineered with durable aluminum and rubber materials, this hose assembly ensures efficient refrigerant flow and system integrity for models like the Buick Enclave and Chevrolet Traverse.

• Constructed from aluminum and rubber for durability and flexibility
• Equipped with P-nut fittings on both ends for secure connections
• Compatible with R134a refrigerant systems
• Includes slim line sealing washers (O-Rings 24404 and 24401) for leak prevention
• Comes with necessary gaskets and fittings included
• Features a hose assembly style with integrated heat exchanger (IHX)
• Designed without brackets or mufflers for direct fitment
• Service port included for system maintenance

Four Seasons Hose Assembly Product Line

The Four Seasons Hose Assembly product line focuses on providing complete hose assemblies tailored for HVAC systems. This line emphasizes compatibility and quality materials to maintain proper refrigerant flow and system pressure. The 66820 part number is part of this line, offering a reliable replacement for suction and liquid line hoses in specific GM vehicles.

Detailed Product Description

This A/C suction and liquid line hose assembly is built to meet the specifications of Buick Acadia, Acadia Limited, Chevrolet Traverse, and GMC Acadia models. The use of aluminum and rubber materials balances strength and flexibility, reducing the risk of leaks or damage under typical operating conditions. Both ends feature P-nut fittings, ensuring a secure and leak-resistant connection to the vehicle’s HVAC system. The included slim line sealing washers (two 24404 and one 24401) provide additional sealing to prevent refrigerant loss. The assembly supports R134a refrigerant, which is standard in these vehicles. The hose assembly style includes an integrated heat exchanger (IHX) to optimize system performance, and the service port allows for easy maintenance and refrigerant charging.

Common Applications and Issues Addressed

• Replacement of worn or damaged A/C suction and liquid line hoses
• Resolving refrigerant leaks caused by cracked or deteriorated hoses
• Restoring proper refrigerant flow in Buick, Chevrolet, and GMC HVAC systems
• Fixing connection issues due to faulty or missing sealing washers
• Maintaining system pressure and preventing contamination

Installation Notes and Tips

Ensure the vehicle’s HVAC system is fully evacuated before removing the old hose assembly. Verify that the P-nut fittings are properly tightened to manufacturer torque specifications to avoid leaks. Replace all O-rings and sealing washers included with the assembly to maintain a secure seal. The service port included facilitates refrigerant charging and system diagnostics. This hose assembly does not include brackets or mufflers, so verify existing mounting points for proper support.

Quality Assurance and Warranty

Four Seasons products are manufactured to meet or exceed OEM standards for fit, form, and function. The 66820 hose assembly undergoes rigorous quality checks to ensure durability and leak-free performance. Warranty coverage details should be confirmed with the product documentation or supplier, as it may vary by region.