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Four Seasons 73418 HVAC Mode Door Actuator
| Brand | Four Seasons 73418 |
|---|---|
| Door Linkage | Male |
| Mounting Ear Qty. | 4 |
| Style | HVAC Air Door Actuator |
| Terminal Pin Qty. | 5 |
| Product line | Air Door Actuator |
| Fits | Cadillac · 6 vehicles |
Air door actuator. Controls HVAC airflow direction with precise door movement.
5-pin design. Provides a straightforward electrical connection for the actuator.
Male linkage. Built with a male door linkage for secure engagement.
Cross-references Four Seasons 73418, 604318 and 22799397 for the same application. See all 5.
Four Seasons 73418 HVAC Air Door Actuator
The Four Seasons 73418 is an HVAC mode door actuator built for vehicles that use a 5-terminal, male door linkage design with 4 mounting ears. It is used in the air distribution system to move the mode door and direct cabin airflow where the climate control system commands it.
For Cadillac ATS and Cadillac CTS applications, this HVAC air door actuator supports precise airflow routing for defrost, panel, and floor operation when the original actuator is worn or no longer responding correctly.
Key Features
- HVAC Air Door Actuator for mode door control
- Male door linkage design
- 4 mounting ears for secure installation
- 5-terminal pin configuration
- Direct replacement part number 73418
- Fits 2013-2015 Cadillac ATS and 2014-2015 Cadillac CTS applications
Product Details
Four Seasons Air Door Actuator 73418 is part of the brand’s HVAC switch, solenoid, and actuator line. This component is used in climate control systems to reposition the air door inside the HVAC housing, helping the system route conditioned air to the selected outlet. It is a practical replacement for vehicles with automatic temperature control and for specific Cadillac CTS defrost applications listed in the fitment data. Cross-reference part numbers for the same application include 604318 and 22799397.
What It Helps Fix
- Airflow stuck on one vent setting
- No response when changing HVAC mode selections
- Defrost air not directing properly
- Inconsistent cabin air distribution
- Clicking or binding from a failing mode door actuator
Installation Notes and Tips
Verify the connector style, mounting ear layout, and linkage type before installation. This part uses a 5-pin terminal layout and a male linkage, so matching the original actuator design is important for proper fitment. Confirm the vehicle’s HVAC configuration, especially on 2015 Cadillac CTS models with Automatic Temperature Control (ATC) and 2014 Cadillac CTS defrost applications. Fits 2013-2015 Cadillac ATS, N/A; Fits 2015 Cadillac CTS, N/A; Fits 2014 Cadillac CTS, N/A.
Quality Assurance
Four Seasons is an established HVAC parts brand, and this actuator is built to serve as a direct replacement for the listed Cadillac applications. Part number 73418 is identified for the specified fitments and cross-reference applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2015 | Cadillac | ATS | — | — | N/A | Air Door Actuator |
| 2015 | Cadillac | CTS | 2.0L | L4 | N/A | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2015 | Cadillac | CTS | 3.6L | V6 | N/A | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | ATS | — | — | N/A | Air Door Actuator |
| 2014 | Cadillac | CTS | — | — | N/A | Defrost; Air Door Actuator |
| 2013 | Cadillac | ATS | — | — | N/A | Air Door Actuator |
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