Four Seasons 64178 A/C Evaporator Core

Four Seasons 64178 Evaporator Core Overview

The Four Seasons 64178 evaporator core is a parallel-flow A/C evaporator core built for HVAC service on select Buick and Chevrolet applications. It is engineered and tested for dependable operation, with O-rings included and male inlet and outlet fittings for a direct replacement-style repair.

Four Seasons Evaporator Core products are part of a long-running mobile A/C line focused on restoring proper cabin cooling performance. This 64178 evaporator core is a fitment-based replacement for 2023 Buick Encore GX and 2021-2023 Chevrolet Trailblazer models.

Key Features

• Part number 64178 from Four Seasons
• Parallel-flow evaporator core design
• O-rings included
• Male inlet fitting and male outlet fitting
• Core dimensions: 10 in. wide, 10-1/16 in. high, 1-3/4 in. deep
• Metric dimensions: 250 mm wide, 274.64 mm high, 45 mm deep

Detailed Product Description

Four Seasons 64178 is an A/C evaporator core designed for HVAC systems that need stable refrigerant heat exchange and consistent interior cooling. The parallel construction supports efficient airflow through the core, while the listed dimensions and male fittings help match the original service layout on the vehicle. This part cross-references UAC EV9409351PFC for the same application.

Use this evaporator core when servicing the air conditioning system on a 2023 Buick Encore GX or a 2021-2023 Chevrolet Trailblazer. The Four Seasons 64178 part number is also referenced in the aftermarket under Continental 64178 and other listed interchange numbers, making it easier to verify the correct replacement during HVAC repair.

Vehicle Fitment

• Fits 2023 Buick Encore GX, N/A
• Fits 2021-2023 Chevrolet Trailblazer, N/A

What It Helps Address

• Weak or inconsistent cabin cooling
• Refrigerant-side leakage at the evaporator core
• Restricted heat transfer inside the HVAC system
• HVAC performance loss from a worn or damaged core
• Service replacement needs on Buick Encore GX and Chevrolet Trailblazer A/C systems

Installation Notes and Tips

Confirm the vehicle application before installation and compare the original core dimensions, fitting style, and system layout to Four Seasons 64178. Replace the included O-rings during service, evacuate and recharge the system according to OEM procedures, and inspect the HVAC case, seals, and related components for contamination or damage before reassembly.

Quality Assurance

Four Seasons states that its mobile A/C products are engineered and tested for years of trouble-free operation, backed by more than 50 years of mobile air conditioning experience. For buyers searching for a Buick Encore GX evaporator core or Chevrolet Trailblazer A/C evaporator core, this part number 64178 offers a verified replacement path for the listed applications.