Aircon/blower issue

[Rob1963]

2016 Passat 1.6 diesel auto. When I start a journey with aircon on and fan blowing all is ok. After about 50 miles the flow gets weaker, and after 80 miles or so, I have it cranked over to full speed fan, and hardly anything is coming out the vents. Any suggestions?

[Volkswagen Owners Club]

Sounds like the motor is failing but also check the resistor pack to see if there is corrosion on the terminals