Dorman 604-870 HVAC Blend Door Actuator - Left Main

Overview of the Dorman HVAC Blend Door Actuator 604-870

The Dorman HVAC Blend Door Actuator 604-870 is designed for precise control of airflow temperature in Acura MDX and Honda Pilot vehicles. This rotary switch actuator ensures reliable operation of your vehicle's HVAC system by regulating the blend door position.

• Rotary switch activation type for smooth and accurate control
• Seven-pin male terminal configuration for secure electrical connection
• Durable plastic construction for long-lasting performance
• Includes one air door actuator per package

Detailed Product Description

This HVAC blend door actuator from Dorman features a rotary switch activation type, which allows for precise modulation of the blend door position within the heating and cooling system. The actuator is equipped with seven male pin terminals, providing a stable and reliable electrical interface. Constructed from durable plastic materials, this part is engineered to withstand the operational demands of Acura MDX and Honda Pilot HVAC systems. The Dorman part number 604-870 corresponds specifically to this actuator model, ensuring compatibility and ease of identification.

Compatible Vehicles and Applications

This actuator is compatible with the following vehicles:

• Acura MDX
• Honda Pilot

It is intended for use in HVAC systems requiring a blend door actuator with a rotary switch and seven-pin male terminal configuration.

Common HVAC Issues Addressed

• Inconsistent cabin temperature due to faulty blend door movement
• Unresponsive or stuck HVAC blend door actuator
• Unusual noises from the HVAC system blend door area
• Failure to switch between heating and cooling modes properly
• Electrical connection problems related to actuator terminals

Installation Notes and Tips

• Ensure vehicle ignition is off before beginning installation
• Disconnect the battery to prevent electrical shorts
• Locate the blend door actuator behind the dashboard on the HVAC housing
• Carefully disconnect the seven-pin male terminal connector
• Remove the old actuator and replace it with the Dorman 604-870 unit
• Verify proper alignment and secure mounting before reconnecting terminals
• Test HVAC system operation after installation to confirm functionality

Quality Assurance and Warranty

Dorman manufactures this HVAC blend door actuator to meet or exceed OEM specifications for Acura MDX and Honda Pilot models. The plastic housing and electrical terminals are designed for durability and consistent performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to the product documentation for exact warranty terms related to part number 604-870.