Dorman 604-866 HVAC Blend Door Actuator - Left Main

Dorman 604-866 HVAC Blend Door Actuator

Dorman 604-866 is a rotary HVAC blend door actuator built for temperature control in select Acura and Honda vehicles. It is engineered to match the fit and function of the original actuator on specific applications, including the Acura RDX and Honda CR-V.

Use this HVAC blend door actuator when the cabin temperature no longer responds correctly to control inputs or when the air distribution system needs a direct replacement for the original unit. The Dorman 604-866 is a direct-fit style replacement for the left main position on supported vehicles.

Key Features

• Rotary switch activation type for HVAC blend door control
• 5-pin male terminal design for vehicle-specific electrical connection
• Plastic housing for standard HVAC actuator packaging and fitment
• Direct replacement for the original blend door actuator on listed applications
• Cross-reference part number: 79160T0AA41
• Part number 604-866 for ordering and fitment verification

Detailed Product Overview

This HVAC heater blend door actuator is designed for temperature control in the HVAC box, where it helps move the blend door to regulate cabin air temperature. It is compatible with 2013-2018 Acura RDX, left main, and 2012-2016 Honda CR-V, left main. For buyers searching for a 2013-2018 Acura RDX blend door actuator or a 2012-2016 Honda CR-V HVAC actuator, Dorman 604-866 provides a vehicle-specific replacement option.

The actuator uses a rotary activation style, a 5-pin male terminal layout, and a plastic construction. Dorman 604-866 is intended to match the quality and performance of the original blend door actuator on the listed vehicles, making it a practical choice when restoring HVAC temperature control in Acura RDX and Honda CR-V models.

Common Problems This Part Can Address

• Cabin temperature stuck on hot or cold
• Inconsistent air temperature from the vents
• HVAC blend door movement that no longer responds correctly
• Temperature control issues in the left main HVAC position
• Faulty actuator operation in the Acura RDX or Honda CR-V HVAC system

Installation Notes and Tips

Verify the connector style, terminal count, and position before installation. This part is listed for the left main HVAC position, so confirm the original actuator location on the vehicle before replacement. After installation, cycle the ignition and HVAC controls to allow the system to relearn actuator position if required by the vehicle.

For fitment-focused searches, this part is listed for 2013-2018 Acura RDX, left main, and 2012-2016 Honda CR-V, left main. Confirm part number 604-866 against the original unit before ordering.

Quality Assurance

Dorman manufactures replacement components to match original equipment fit and function on specific applications. Part number 604-866 is built for the listed Acura and Honda fitments and is backed by Dorman’s product engineering standards.