Four Seasons 73620 HVAC Mode Door Actuator

HVAC Mode Door Actuator for Select GM SUVs

Four Seasons 73620 is an HVAC mode door actuator built for precise air-door control in the climate system. It is a direct-fit style replacement for select Chevrolet Equinox, GMC Terrain, and Buick Envision applications, with a 6-terminal pin layout and male door linkage.

Engineered and tested for dependable operation, this Four Seasons HVAC air door actuator is a practical choice when the mode door stops directing airflow correctly. Four Seasons 73620 is made for vehicles that need accurate HVAC air distribution control.

Key Features

• HVAC mode door actuator for air direction control
• Male door linkage for the specified application
• 3 mounting ears for secure installation alignment
• 6-terminal pin electrical connection
• Four Seasons part number 73620
• Direct replacement style for select GM HVAC systems

Detailed Description

This actuator controls the HVAC mode door, helping route cabin airflow between vents, floor outlets, and defrost settings as commanded by the climate control system. It is designed for 2018-2024 Chevrolet Equinox, 2018-2024 GMC Terrain, and 2016-2020 Buick Envision applications. If your Chevrolet Equinox, GMC Terrain, or Buick Envision has inconsistent airflow direction or a mode setting that does not respond correctly, Four Seasons 73620 is the replacement component to inspect.

This part cross-references 604346 and 23155241 for the same application.

What It Helps Fix

• Airflow stuck on one vent setting
• No response when changing from panel to floor or defrost
• Clicking or binding from the HVAC actuator area
• Incorrect cabin air distribution in the Chevrolet Equinox, GMC Terrain, or Buick Envision
• Climate control mode door movement that no longer tracks the command

Installation Notes and Tips

Verify the connector style, 6-terminal pin layout, male linkage, and 3-ear mounting pattern before installation. Confirm the vehicle’s HVAC system matches the listed fitment for your year and model, and compare the original actuator to Four Seasons 73620 before replacement. After installation, cycle the HVAC controls through each mode setting to confirm proper door movement and airflow direction.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. Backed by more than 50 years of mobile A/C experience, this actuator reflects the brand’s focus on reliable HVAC service parts.