vtraudt

The climate control 'partially' works (fan, control unit, air vents, etc) but it does NOT get really warm.
The scan shows the following codes (below).
Where should I start with the troubleshooting. Someone told me NOT to jump at replacing the module yet.

Address 08: Auto HVAC Labels: 8L0-820-043-2D.lbl
Part No: 8L0 820 043 D
Component: A4 KLIMAVOLLAUTOMAT_D75
Coding: 04162
Shop #: WSC 06325
VCID: 29570979F97F

6 Faults Found:
00792 - A/C Pressure Switch (F129)
31-00 - Open or Short to Ground
00532 - Supply Voltage B+
07-00 - Signal too Low
01297 - Sensor for Vent Temperature; Footwell (G192)
30-00 - Open or Short to Plus
01296 - Sensor for Vent Temperature; Center (G191)
30-00 - Open or Short to Plus
01206 - Signal for Duration of Ignition Off Time
27-10 - Implausible Signal - Intermittent
01582 - Signal for Coolant Temperature
30-00 - Open or Short to Plus