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Dorman 604-174 HVAC Blend Door Actuator - Left Main
| Brand | Dorman 604-174 |
|---|---|
| Position | Left Main |
| Material | Plastic |
| Package Contents | Actuator |
| Switch Activation Type | Rotary |
| Fits | Cadillac · 7 vehicles |
OE-style replacement. Precision-engineered to match original quality and performance.
Rotary activation. Smooth, precise control of the blend door actuator.
Plastic construction. Lightweight design for dependable HVAC operation.
Cross-references Standard Ignition ADR4229, 89023389 and ADS4229 for the same application. See all 4.
Dorman 604-174 HVAC Blend Door Actuator
The Dorman 604-174 HVAC blend door actuator is a rotary, plastic replacement built to match the original heater blend door actuator used on specific Cadillac STS applications. It is engineered for temperature control operation in the HVAC box and is a direct-fit option for 2005-2011 Cadillac STS, Left Main.
Key Features
- Rotary switch activation for HVAC blend door control
- Plastic housing construction
- Replacement actuator for temperature control in the HVAC box
- Direct-fit application for 2005-2011 Cadillac STS, Left Main
- Part number 604-174 for easy identification
Detailed Description
This HVAC heater blend door actuator is designed for vehicles that use an electrically controlled rotary actuator to position the blend door and regulate cabin air temperature. Dorman 604-174 is built to match the original actuator’s fit and function on the specified Cadillac STS years, helping restore proper temperature blending through the HVAC system. This part cross-references Standard Ignition ADR4229 for the same application.
Compatible With 2005-2011 Cadillac STS, Left Main. The Dorman 604-174 listing is focused on the temperature control actuator location used in the HVAC box, making it a relevant search match for Cadillac STS blend door actuator replacement, Cadillac STS HVAC temperature control repair, and 2005-2011 Cadillac STS Left Main actuator service.
Common Issues This Part May Address
- Cabin air stuck on hot or cold
- Inconsistent temperature changes from the vents
- HVAC blend door movement problems
- Temperature control response issues in the dash HVAC system
- Actuator noise or failure during mode changes
Installation Notes and Tips
Verify the original actuator location and connector style before installation. On 2005-2011 Cadillac STS models, Left Main placement matters for correct HVAC temperature control operation. After installation, cycle the ignition and HVAC controls to confirm the blend door responds properly and the system reaches both hot and cold settings.
Quality Assurance
Dorman designs this replacement actuator to align with the quality and performance of the original part used on the listed vehicle applications. Part number 604-174 is intended as an OE-style service replacement for the specified Cadillac STS HVAC system.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2011 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
| 2010 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
| 2009 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
| 2008 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
| 2007 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
| 2006 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
| 2005 | Cadillac | STS | Left Main | Temperature control HVAC blend door actuator for box packaging. |
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