The actuator that controls heat/cooling is located in the area just above the driver's right foot. To access, pull down the panel below the steering wheel, then slide it to the left. It will come off. Then you can see the actuator. There are two. The lower actuator controls the heat/cooling. It has two t20 screws. Very easy to access, remove, replace. The upper actuator controls the direction of airflow (feet, face, defrost). It's upper screw is more difficult to access.