Dorman 604-938 HVAC Blend Door Actuator - Main

Dorman 604-938 HVAC Blend Door Actuator

Dorman 604-938 is a heater blend door actuator built for specific Mercedes-Benz ML-Class applications. It uses a rotary switch activation design and a plastic housing to match the original HVAC actuator function on the listed vehicles.

Key Features

• Rotary switch activation type for HVAC blend door control
• Plastic construction
• Direct replacement for the original heater blend door actuator on listed applications
• Fits Mercedes-Benz ML350, ML500, ML320, and ML55 AMG applications shown below
• Part number 604-938 for easy identification

Detailed Description

This HVAC blend door actuator is engineered to match the quality and performance of the original unit on specific Mercedes-Benz vehicles. It is used in temperature control and recirculation HVAC functions depending on the application, helping the system direct air through the proper doors inside the heater and air conditioning box. For buyers searching for a Mercedes-Benz ML350 blend door actuator or a Mercedes-Benz ML500 HVAC actuator, Dorman 604-938 provides a direct-fit replacement for the listed model years.

This part cross-references Genuine 1638200108 for the same application.

What It Helps Fix

• Incorrect cabin temperature control
• Airflow stuck on hot or cold
• HVAC doors not responding to control inputs
• Recirculation door operation problems on listed ML-Class models
• Noise from a worn or failing blend door actuator

Installation Notes and Tips

Verify the vehicle year, model, and HVAC position before ordering. This part is listed for Main position applications on the specified Mercedes-Benz ML-Class vehicles, including temperature control and recirculation functions depending on the model year. Confirm the original actuator style and connector layout against the removed unit before installation.

• Fits 2003-2005 Mercedes-Benz ML350, Main
• Fits 2002-2005 Mercedes-Benz ML500, Main
• Fits 2002-2003 Mercedes-Benz ML320, Main
• Fits 2002-2003 Mercedes-Benz ML55 AMG, Main
• Fits 1998-2001 Mercedes-Benz ML320, Main
• Fits 1999-2001 Mercedes-Benz ML430, Main
• Fits 2000-2001 Mercedes-Benz ML55 AMG, Main

Quality Assurance

Dorman designs this HVAC heater blend door actuator to match the performance and quality of the original part on the listed applications. The part number 604-938 is supported by interchange references including Dayco 73114, TechSmart G04026, and SK604938.