The small motorized door behind my fan for the heating/cooling system is not recognizing when it is either fully open or closed, and depending on the airflow setting I choose it opens or closes ad cannot realize that it is fully open and the motor will continue to attempt to continue grinding, causing a tapping noise that stops after about 10-15 seconds. What is causing this, as it happens every time I start my truck up, and is extremely annoying. Thanks!
