Four Seasons 73182 HVAC Blend Door Actuator - Left

Four Seasons 73182 Air Door Actuator

The Four Seasons 73182 HVAC blend door actuator is a direct-fit air door actuator for the left side of select Cadillac STS models. Built with an arm-style door linkage, 4 mounting ears, and a 5-pin terminal layout, it is specified for controlled HVAC air door movement in the vehicle’s climate system.

For drivers searching for a 2005-2011 Cadillac STS left air door actuator, this Four Seasons Air Door Actuator line provides a service replacement focused on fitment and connector compatibility. Part number 73182 is also referenced in HVAC actuator cross-reference listings for the same application.

Key Features

• Brand: Four Seasons
• Part number: 73182
• HVAC blend door actuator / air door actuator
• Arm-style door linkage
• 4 mounting ears for secure installation
• 5-terminal pin configuration
• Left-side application for select Cadillac STS vehicles

Product Details

This HVAC air door actuator is used to move the blend or air door inside the climate control housing, helping regulate airflow distribution and temperature control. It is a fitment-based replacement for 2005-2011 Cadillac STS left-side applications, making it a practical choice when servicing a Cadillac STS HVAC blend door actuator concern. The Four Seasons 73182 is also listed with interchange references including 1712381 and 604174 for the same application.

Common Issues It May Address

• Incorrect air temperature from the vents
• Airflow stuck on one outlet setting
• HVAC door movement that is inconsistent or unresponsive
• Clicking or binding from the climate control housing
• Loss of proper left-side air door operation in the HVAC system

Installation Notes and Tips

Verify the original actuator’s linkage style, mounting ear count, terminal pin count, and left-side location before installation. On 2005-2011 Cadillac STS models, confirm the connector and door linkage match the removed unit so the replacement aligns correctly with the HVAC housing. After installation, cycle the climate control system to confirm smooth door movement and proper temperature response.

Quality Assurance

Four Seasons HVAC components are cataloged for direct replacement use in vehicle climate control service. Part number 73182 is listed for confirmed Cadillac STS fitment and supported by interchange references for the same application.