Four Seasons 66921 A/C Refrigerant Suction Hose

Ford F-150 A/C Suction Hose Assembly

Restore refrigerant flow on compatible Ford truck applications with this Four Seasons A/C refrigerant suction hose assembly. Part number 66921 is built with aluminum and rubber construction, includes the service port and required seals, and is configured for R134A systems.

Compatible With 2015-2020 Ford F-150 models using R134a refrigerant, this hose assembly is a direct-fit HVAC replacement for the suction side of the air conditioning system. Four Seasons hose assemblies are engineered and tested for dependable operation in mobile A/C service.

Key Features

• Part number 66921 A/C refrigerant suction hose assembly
• Fits 2015-2020 Ford F-150, N/A, with R134a
• Aluminum / rubber construction for HVAC routing and durability
• P-nut fitting on both ends
• Includes gasket or seal, service port, and muffler
• Uses R134A refrigerant
• Includes O-ring A 24258 sealing washer and O-ring B 24243 kit
• Without bracket and without switch service port

Product Details

This Four Seasons hose assembly is made for the A/C refrigerant suction circuit and is identified by part number 66921. It is built for 2015-2020 Ford F-150 applications with R134a refrigerant, using P-nut fittings at both ends for the specified HVAC connection points. The aluminum/rubber design, integrated muffler, and included seals support a proper replacement for the original suction hose assembly.

Four Seasons Hose Assembly products are part of a long-running mobile air conditioning line focused on tested, service-ready replacement components. If you are searching for a Ford F-150 A/C suction hose assembly, Ford F-150 HVAC hose replacement, or Four Seasons 66921 for 2015-2020 Ford F-150 R134a systems, this part matches those needs directly.

This part cross-references UAC HA11575C for the same application.

What It Helps Fix

• Refrigerant loss from a damaged suction hose
• Weak or inconsistent A/C performance in the Ford F-150
• Leaks at hose connections, seals, or fittings
• Noisy or restricted suction-side refrigerant flow
• Failed original hose assembly on R134a-equipped trucks

Installation Notes

• Verify the vehicle is a 2015-2020 Ford F-150 with R134a before ordering.
• Confirm both hose-end connections match the P-nut fitting design.
• Replace seals and O-rings during installation to help maintain system integrity.
• Recover and recharge the A/C system according to proper HVAC service procedures.
• Inspect adjacent A/C components for wear or contamination before final assembly.

Quality Assurance

Four Seasons backs this hose assembly with more than 50 years of mobile A/C experience. The brand states its products are engineered and tested to deliver years of trouble-free operation, supporting a repair-focused replacement for the Ford F-150 A/C system.