Four Seasons 73043 HVAC Mode Door Actuator

Four Seasons 73043 HVAC Air Door Actuator

The Four Seasons 73043 is an HVAC mode door actuator built for vehicles with manual climate control. It uses a female door linkage, a 3-ear mounting design, and a 4-terminal pin connection to help control airflow direction inside the HVAC system.

Compatible with 2000-2005 Buick LeSabre and 2000-2005 Pontiac Bonneville applications with manual HVAC control, this Four Seasons Air Door Actuator is a direct-fit service part for restoring proper mode door movement. The Four Seasons 73043 part number is also a useful reference when matching replacement actuators for these vehicles.

Key Features

• HVAC mode door actuator for air distribution control
• Female door linkage connection
• 3 mounting ears for secure installation
• 4-terminal pin electrical connection
• Four Seasons Air Door Actuator line
• Part number 73043 for application matching

Product Details

The Four Seasons Air Door Actuator line covers HVAC control components that move internal doors responsible for directing cabin air. This mode door actuator is specified with a female linkage, 3 mounting ears, and a 4-pin terminal layout, making it important to match the connector style and mounting configuration during replacement. For 2000-2005 Buick LeSabre and 2000-2005 Pontiac Bonneville models with manual HVAC control, 73043 supports the air door function needed for proper vent, floor, and defrost airflow routing. This part cross-references Dayco 73043 for the same application.

What It Helps Fix

• Airflow stuck on one vent setting
• Loss of control between panel, floor, and defrost modes
• HVAC doors that do not respond correctly to manual controls
• Inconsistent cabin air direction
• Mode door movement problems caused by a worn actuator

Installation Notes and Tips

Verify the connector style, mounting ear count, and linkage type before installation. This actuator is listed for manual HVAC control systems only, so confirm your vehicle’s climate control setup before ordering. Compare the original part number and connector layout to the existing unit on the vehicle to ensure a proper match for Buick LeSabre or Pontiac Bonneville service.

Quality Assurance

Four Seasons supplies HVAC replacement components for service applications, and this actuator is cataloged for direct fitment on the listed vehicles. Confirm fitment by year, make, model, and HVAC control type before installation.