Dorman 604-018 HVAC Blend Door Actuator - Main

Dorman 604-018 HVAC Blend Door Actuator

Dorman 604-018 is a heater blend door actuator built for specific Dodge Ram truck applications. It is precision-engineered to match the quality and performance of the original HVAC blend door actuator, helping restore proper temperature control in the cabin.

• Rotary switch activation type for HVAC blend door operation
• Blade terminals with 4 male terminals
• Plastic housing construction
• Direct replacement for the original blend door actuator on listed applications
• Cross-references Dorman 604-018 with 5012924AA for the same application

Detailed Application Coverage

Compatible With 1999-2002 Dodge Ram 2500, Main; 1999-2002 Dodge Ram 3500, Main; 1999-2001 Dodge Ram 1500, Main; and 1999-2001 Dodge Ramcharger, Main. This HVAC blend door actuator is used in the main blend door position to control air temperature distribution in the heating and air conditioning system. For Dodge Ram 1500, Dodge Ram 2500, and Dodge Ram 3500 models, Dorman 604-018 provides a direct-fit replacement path for restoring blend door movement and cabin comfort.

What It Helps Fix

• Incorrect cabin air temperature
• Blend door movement problems
• HVAC temperature control loss
• Stuck hot or cold air output
• Actuator-related HVAC response issues

Installation Notes and Tips

Verify the vehicle year, make, model, and main blend door position before installation. Confirm the connector style, blade terminal layout, and 4-terminal configuration match the original unit. Access to the HVAC housing may vary by vehicle, so compare the removed actuator to the replacement before final assembly.

Quality Assurance

Dorman designs this HVAC heater blend door actuator to match original equipment quality and performance for the listed applications. Part number 604-018 is built as an OE-style replacement for specific Dodge HVAC systems.