What would cause low fan speed on the A/C unit? Some say the "box" in the vent on 2004 Volkswagen R32

Have had major work on the A/C system, sensors replaced, power module replaced, both fans replaced, full charge on gas. Even with fan pot on high only slight whisper of output through the vents....air nice and cold but relatively little air flow.

Asked by for the 2004 Volkswagen R32
There is a resistor that controls the blower speed. It is a commonly replaced item on many vehicles. It is located behind the glovebox attached to the blower motor. A good shop that handles many Euros should be able to take care of that for you.

Good Luck,
Euro-Asian Motorcars, Inc.
Edison, NJ