Dorman 604-830 HVAC Blend Door Actuator - Main

Dorman 604-830 HVAC Blend Door Actuator

The Dorman 604-830 HVAC blend door actuator is a direct-fit replacement for specific Volkswagen Passat and Audi applications with automatic temperature control. It is precision-engineered to match the quality and performance of the original blend door actuator, helping restore proper HVAC door movement and cabin air control.

Key Features

• Rotary switch activation type for controlled HVAC door movement
• 5-pin male terminal design for the specified vehicle electrical connection
• Plastic housing construction
• Matches original-style fit and function for selected recirculation and air inlet applications
• Designed for vehicles equipped with Automatic Temperature Control (ATC)
• Direct replacement part number: Dorman 604-830

Detailed Description

This HVAC heater blend door actuator is built for select 1998-2005 Volkswagen Passat and 1998-2002 Audi A4, A4 Quattro, S4, RS4, and S3 models with ATC. In the correct application, it helps control the blend door or recirculation door position so the HVAC system can direct air as intended. This part cross-references URO 8D1820511G for the same application.

Use Dorman 604-830 when you need an OE-style replacement for a failed actuator in a Volkswagen Passat or Audi A4 HVAC system. The part number 604-830 is also referenced by several interchange numbers, making it easier to verify the correct replacement before installation.

What It Helps Fix

• HVAC doors that stop responding to temperature or recirculation commands
• Airflow stuck on one setting instead of changing with the control head
• Recirculation or air inlet doors that do not move correctly
• Inconsistent cabin temperature control in ATC-equipped vehicles
• Noise or binding from a worn HVAC actuator

Installation Notes and Tips

Confirm the vehicle year, make, model, position, and notes before ordering. Fits 1998-2005 Volkswagen Passat, Main, recirculation, w/Automatic Temperature Control (ATC). Fits 1999-2002 Audi A4 and Audi A4 Quattro, Main, recirculation, w/ATC, with VIN breakpoints noted for 1998 and 2002 models. Fits 2000-2002 Audi S4, S3, and RS4, Main, with the listed recirculation or air inlet configuration and ATC. Verify connector style, terminal count, and actuator location against the original unit before replacement.

Quality Assurance

Dorman engineers this HVAC blend door actuator to match the quality and performance of the original part on the listed vehicles. The design follows the specified rotary activation, pin-terminal layout, and application-specific fitment for a reliable replacement in the correct Volkswagen and Audi HVAC system.