OE Quality
60-Day Returns

Four Seasons 73174 HVAC Recirculation Door Actuator
Reliable HVAC Recirculation Door Actuator for Cadillac Vehicles
The Four Seasons Air Door Actuator 73174 is designed to restore proper airflow control in your Cadillac CTS, SRX, and STS models. This HVAC recirculation door actuator ensures precise operation of the air door linkage, maintaining optimal climate control inside your vehicle.
- Compatible with Cadillac CTS, SRX, and STS models
- Part number 73174 for accurate identification
- Features an arm-style door linkage for smooth movement
- Equipped with 4 mounting ears for secure installation
- Includes 5 terminal pins for reliable electrical connection
About the Four Seasons Air Door Actuator Product Line
The Air Door Actuator line by Four Seasons focuses on delivering dependable HVAC components that regulate airflow within vehicle climate systems. This product line includes actuators engineered to control various air doors, such as recirculation doors, ensuring consistent performance and compatibility with specific vehicle makes and models. The 73174 actuator is part of this line, tailored to meet the precise requirements of Cadillac HVAC systems.
Product Details and Specifications
The Four Seasons 73174 HVAC recirculation door actuator features an arm-style door linkage that facilitates accurate movement of the air door within the HVAC system. It mounts securely using four mounting ears, providing stability and reducing the risk of vibration or misalignment. The actuator connects electrically through five terminal pins, ensuring a stable and consistent signal for proper operation. This part is engineered specifically for Cadillac CTS, SRX, and STS models, making it a direct replacement for the original equipment actuator.
Common Issues Resolved by This HVAC Recirculation Door Actuator
- Inconsistent or stuck air recirculation door movement
- Unresponsive HVAC airflow control in Cadillac CTS, SRX, or STS
- Unusual noises from the HVAC system due to faulty actuator linkage
- Failure to switch between fresh air and recirculated air modes
- Electrical connection problems causing intermittent HVAC operation
Installation Notes and Tips
When installing the Four Seasons 73174 actuator, ensure the four mounting ears align properly with the HVAC housing to avoid misalignment. Verify that the arm-style door linkage moves freely without obstruction. Carefully connect all five terminal pins to the vehicle’s wiring harness to maintain a secure electrical connection. It is recommended to test the actuator operation before reassembling the dashboard components to confirm proper function.
Quality Assurance and Warranty Information
Four Seasons manufactures the 73174 Air Door Actuator to meet or exceed OEM standards for durability and performance. This part undergoes rigorous quality control to ensure reliable operation within Cadillac CTS, SRX, and STS HVAC systems. Warranty coverage details should be confirmed with the supplier or manufacturer, as they may vary by region or distributor.
| Brand | Four Seasons |
| Part Number | 73174 |
| Position | Air Door Actuator |
| Door Linkage | Arm |
| Mounting Ear Qty. | 4 |
| Style | HVAC Air Door Actuator |
| Terminal Pin Qty. | 5 |
This part fits 18 vehicles. Search below:
| Year | Make | Model | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2015 | Cadillac | CTS | Coupe | 6.2L | V8 | N/A | Air Door Actuator |
| 2014 | Cadillac | CTS | Coupe | 2.0L | L4 | N/A | Air Door Actuator |
| 2014 | Cadillac | CTS | Coupe | 3.6L | V6 | N/A | Air Door Actuator |
| 2014 | Cadillac | CTS | Coupe | 6.2L | V8 | N/A | Air Door Actuator |
| 2013 | Cadillac | CTS | N/A | Air Door Actuator | |||
| 2012 | Cadillac | CTS | N/A | Air Door Actuator | |||
| 2011 | Cadillac | CTS | N/A | Air Door Actuator | |||
| 2011 | Cadillac | STS | N/A | Air Door Actuator | |||
| 2010 | Cadillac | CTS | N/A | Air Door Actuator | |||
| 2010 | Cadillac | STS | N/A | Air Door Actuator | |||
| 2009 | Cadillac | SRX | 3.6L | V6 | N/A | Air Door Actuator | |
| 2009 | Cadillac | STS | N/A | Air Door Actuator | |||
| 2008 | Cadillac | SRX | 3.6L | V6 | N/A | Air Door Actuator | |
| 2008 | Cadillac | STS | N/A | Air Door Actuator | |||
| 2007 | Cadillac | SRX | 3.6L | V6 | N/A | Air Door Actuator | |
| 2007 | Cadillac | STS | N/A | Air Door Actuator | |||
| 2006 | Cadillac | STS | N/A | Air Door Actuator | |||
| 2005 | Cadillac | STS | N/A | Air Door Actuator |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.