The HVAC actuator is a small motor that moves the blend and mode doors to control your cabin's temperature and airflow. When it fails, you may hear clicking or knocking sounds behind the dash, or the air may not get warm or cold like it should. Replacing the actuator restores proper temperature control and airflow direction.
Find a TechnicianA failing actuator often makes a repeating clicking, knocking, or tapping sound behind the dashboard, especially when you change the temperature or fan settings. The noise happens because the internal gears are worn or stuck.
This usually means the blend door actuator has failed and can no longer move the door that mixes hot and cold air. Replacing the actuator restores your ability to adjust the cabin temperature.
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