Dorman 604-181 HVAC Blend Door Actuator - Main

Dorman 604-181 HVAC Blend Door Actuator

Dorman 604-181 is an HVAC blend door actuator built for specific Cadillac applications where precise air door movement is needed for proper cabin temperature control. It is engineered to match the quality and performance of the original actuator on select Cadillac ATS and Cadillac CTS models.

• Rotary switch activation type for controlled HVAC door movement
• 4-pin male terminal design for the specified vehicle connection
• Plastic housing construction
• Direct replacement for the original blend door actuator on listed applications
• Cross-references Standard Ignition ADR4305 for the same application

Application Details

This HVAC heater blend door actuator is used in the main air inlet position on select Cadillac ATS and Cadillac CTS vehicles. It is listed for 2013-2017 Cadillac ATS with RPO code KL9 stop/start system, 2018 Cadillac ATS, 2019 Cadillac ATS with RPO code KL9 stop/start system, and 2016-2019 Cadillac CTS. If you are searching for a Cadillac ATS blend door actuator or a Cadillac CTS HVAC actuator by part number, Dorman 604-181 is the direct-fit reference to review.

What It Helps Fix

• Inconsistent cabin temperature control
• Airflow stuck on hot or cold
• HVAC mode or blend door movement problems
• Temperature changes that do not respond correctly to control inputs
• Noise from a worn or failing air door actuator

Installation Notes

Verify the vehicle year, model, position, and RPO code before ordering. This part uses a rotary activation style with a 4-terminal male pin connection, so connector match and actuator indexing should be checked during installation. Confirm the main air inlet location on the vehicle and compare the original unit to Dorman 604-181 before replacement.

Quality Assurance

Dorman states that this HVAC heater blend door actuator is precision-engineered to match the quality and performance of the original part on the listed vehicles. That OE-style fit and function focus makes it a practical replacement choice for service work on Cadillac ATS and Cadillac CTS HVAC systems.