Four Seasons 73184 HVAC Mode Door Actuator - Auxiliary

Four Seasons 73184 Air Door Actuator

The Four Seasons 73184 HVAC mode door actuator is built for precise air door movement in the climate control system. It is a direct-fit style HVAC air door actuator with an arm-style door linkage, 5 terminal pins, and 4 mounting ears for secure installation.

Fits 2005-2011 Cadillac STS, Auxiliary. This Four Seasons Air Door Actuator line is focused on restoring controlled airflow through the HVAC case when the mode door needs accurate positioning.

Key Features

• HVAC mode door actuator for air distribution control
• Arm-style door linkage for the specified application
• 5 terminal pin electrical connection
• 4 mounting ears for stable attachment
• Direct replacement part number 73184

Detailed Description

Four Seasons 73184 is an HVAC air door actuator used to move the mode door inside the heating and air conditioning housing. In 2005-2011 Cadillac STS Auxiliary applications, this actuator helps direct airflow to the selected outlet position by responding to the vehicle’s HVAC control signals. The part number 73184 is also referenced under cross numbers such as 604176 and 1573027 for the same application.

Compatible With 2005-2011 Cadillac STS, Auxiliary. If your Cadillac STS has inconsistent vent selection, delayed airflow changes, or a mode door that does not respond correctly, this actuator is the type of replacement used to restore proper HVAC door movement.

Common Issues This Part May Address

• Airflow stuck at one vent position
• Mode changes that do not respond from the dash controls
• Clicking or binding from the HVAC case area
• Incorrect air distribution in the auxiliary HVAC system
• Loss of smooth movement in the air door linkage

Installation Notes and Tips

Verify the connector style, mounting ear layout, and door linkage style before installation. Match the replacement to the vehicle’s original actuator location and confirm the HVAC system is set to the correct mode before final testing. After installation, cycle the climate controls through each mode setting to confirm proper door movement.

Quality Assurance

Four Seasons is a recognized HVAC parts brand, and this actuator is built to match the specified fitment and electrical configuration for the listed Cadillac STS applications. Part number 73184 is intended for direct replacement use in the confirmed vehicle range.