There are a few potential reasons why the blower for the A/C in your 2013 VW Touareg TDI Executive might not be functioning properly, even when set to high. Here are some common issues to consider:
Blower Motor Failure: The blower motor itself might be malfunctioning or failing. Over time, blower motors can wear out due to usage or electrical issues.
Blower Motor Resistor: The blower motor resistor controls the speed of the blower motor. If the resistor is faulty, it might not allow the blower motor to operate at higher speeds, even when set to high.
Clogged Cabin Air Filter: A clogged cabin air filter can restrict airflow, reducing the effectiveness of the blower motor even when it's functioning properly.
Bad mode door actuator: A faulty mode door actuator could also be the culprit for the issue you're experiencing with the A/C blower in your VW Touareg. The mode door actuator is responsible for controlling the direction of airflow within the HVAC system. If it fails or becomes stuck, it can result in inadequate airflow, even when the blower motor itself is functioning correctly.
When the mode door actuator malfunctions, it may not properly adjust the position of the door, which can lead to restricted airflow or airflow being directed to the wrong vents. This could potentially create the symptom of reduced airflow, even when the blower is set to high.
