When I make my Passat really quiet by not turning the engine on and switching off the Climatronics I still hear something buzzing, crackling - the sound is coming from under the dash, where passenger normally keeps their legs.
It is quiet enough I do not hear it while driving, but I am curious what can it be?
The sound resembles slightly the actuators of the vent flaps, but why would the sound be there all the time, even if blower is off and A/C is off?
I have suspected the intake air fan inside the Climatronics module but I disassembled it, removed this fan, clean the dust of it with a soft brush and from the thermistor but it did not help, the sound is still coming deep from behind center column.
Can anybody guess what it might be?
2004 Passat GLX, V6 2.8l