Sharan 7N: Rear AC not working

Hi all.

I have 3 weeks ago bought a newer VW Sharan 7N from 2015, it has 2 AC units installed (3-zone climatronic) one in front and one in the right side of the rear for HVAC in the rear of the car. No air comes from the rear vents even though I put the rear fan to max. I have once heard it working and blowing, but after this never again.
I tested with VCDS and it gives me this error:

Any ideas are welcome.

9478929 - Diagnostic Line for Rear Air Blower
B10A3 11 [008] - Short to Ground
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 107
Reset counter: 196
Mileage: 291810 km
Date: 2017.08.21
Time: 14:16:14

Here is a picture of the dual AC system in the Sharan 7N:

imgur.com/a/P9fDm