Help needed: 2013 S7, HVAC not blowing any warm air

[bakes]

Hi all,

Out of the blue my cars heating seems to have stopped working. No error lights on the dash but certainly blowing air that is not being heated.

Ran a scan and have this error:

Address 08: Auto HVAC (J255) Labels:| 4G0-820-043-4Z.clb
Part No SW: 4G0 820 043 AF HW: 4G0 820 043 AF
Component: KLIMA 4 ZONEN H13 0076
Serial number: 09011300040390
Coding: 688320BE5D
Shop #: WSC 02391 785 00200
ASAM Dataset: EV_AirCondiComfoUDS 002036
ROD: EV_AirCondiComfoUDS_002.rod
VCID: 63CE3B676ACDD0953E-8036

1 Fault Found:
0379 - Supply Voltage Terminal 30 for Coolant Pump
B11D5 01 [009] - Electrical Failure
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 3
Fault Frequency: 1
Reset counter: 97
Mileage: 162234 km
Date: 2022.11.08
Time: 12:29:29

Voltage terminal 30: 14.24 V
Outside temperature: 20.5 °C
Inside temperature: 21.59 °C

Any thoughts on root cause? I've tried to clear all codes but this comes back right away.

Many thanks for any suggestions or feeback!

[Mesquite77]

Yes, that is what you get (I have it now, and am going to DIY replace it soon) when the electrical coolant pump at top back of engine, under the plenum beside the air intake box just in front of passenger windshield wiper fails. It is the pump that sends coolant to the heater core. Audi calls it "V50", not to be confused with the "V51 continued recirculation pump" which is different.

See post #5: https://www.audiworld.com/forums/a6-...-pump-3003769/