Audi TT MK1 Climate Control strange behavior, or should it be so, maybe?



Verified VCDS User
Sep 5, 2016
Reaction score
Riga, Latvia
VCDS Serial number
Car is TT MK1, MY 2000.
Problem is that air from center vents of dash comes much warmer than from side vents (both).
Does not matter, what mode is used - auto, econ, recirculation, what flow direction is set etc.
At the moment of measurements outside T is approx +3 degrees C, in workshop, where car is located is approx +10 degrees, climate control is set to 22 degrees, engine is at working T, average T in passenger compartment is maintained +/- ok as set value, only from side vents comes approx +20, but from center vents approx +30. If set value is increased, difference increases, too.
No fault codes. Recirculation flap motor was faulty, but I replaced it before. All flaps are where commanded, according position sensor data. According RTFB there are no any separate air distribution or temperature regulation between center and side outlets.
Any comments from TT MK1 owners or repairers are welcome.
Autoscan and MVB map below.
P.S. Permanent airbag disable switch fault is stored because glove box is still removed for recirculation motor replacement.
VCDS -- Windows Based VAG/VAS Emulator Running on Windows XP x86
VCDS Version:
Data version: 20190529 DS308.0

Workshop Code: 123 12345 012345

Chassis Type: 8N - Audi TT (1999 > 2007)
Scan: 01 02 03 08 15 17 22 35 37 45 55 56 76 77
   Mileage: 237050km-147296miles
Address 01: Engine        Labels: 06A-906-032-AJQ.clb
   Part No: 8N0 906 018 A
   Component: 1.8L R4 5VT         0010  
   Coding: 05500
   Shop #: WSC 01236  
   VCID: 2F6D7983ED63F63730-5140

No fault code found.
Readiness: 0000 0000

Address 03: ABS Brakes        Labels: 8N0-907-379-MK20.lbl
   Part No: 8N0 907 379 
   Component: ASR     20 IE CAN  0001  
   Coding: 13204
   Shop #: WSC 01236  
   VCID: 79F987DB63A7E887DE-4B00

No fault code found.

Address 08: Auto HVAC        Labels: 8N0-820-043.lbl
   Part No: 8N0 820 043 
   Coding: 00040
   Shop #: WSC 01236  
   VCID: 67DDD1A305136E7738-2580

No fault code found.

Address 15: Airbags        Labels: 8N8-909-601.lbl
   Part No: 8N8 909 601 
   Component: Airbag Front+Seite 0005  
   Coding: 10102
   Shop #: WSC 01236  
   VCID: 77FD81E355B3FEF7A8-5140

1 Fault Found:
01228 - Airbag Cut-Off Switch for Passenger Side (E224) 
            30-00 - Open or Short to Plus

Address 17: Instruments        Labels: 8Nx-919-xxx-17.lbl
   Part No: 8N1 919 860 C
   Component: KOMBI+WEGFAHRS. M73 D30  
   Coding: 00144
   Shop #: WSC 00558  
   VCID: 3B755DD3291B1A978C-4B00

   Subsystem 1 - Part No: Ident
   Component: Nr. Wegfahrs.:AUZ5Z0E9075010  
   Ident.-Nr. Wegfahrs.:AUZ5Z0E9075010

No fault code found.

Address 35: Centr. Locks        Labels:. 8Nx-962-267.lbl
   Part No: 8N8 962 267 
   Component: Zentralverrieg.,DWA D04  
   Coding: 04682
   Shop #: WSC 00000  

No fault code found.

Address 45: Inter. Monitor        Labels: 8E0-951-177.lbl
   Part No: 8N8 951 177 
   Component: Innenraumueberw.    D09  
   Coding: 00001
   Shop #: WSC 00000  
   VCID: 7CF79ECF6C95DDAFC5-51B6

No fault code found.

Address 56: Radio        Labels: 8D0-035-1xx-56.lbl
   Part No: 4B0 035 186 B
   Component:  Radio              D04  
   Coding: 00201
   Shop #: WSC 01236  
   VCID: 1F4D89439DC366B780-4B1A

No fault code found.

End-------------------------(Elapsed Time: 03:42)--------------------------

;SW:8N0-820-043   HW: ---  Auto HVAC
;Component:TT-KLIMAVOLLAUTOMAT D02, Coding:00040
;VCDS Version: Release 19.6.1  Data version: 20190529 DS308.0
;VCID: 67DDD1A305136E7738-2580

Group,Field 1,Data type,Field 2,Data type,Field 3,Data type,Field 4,Data type,
1,0.0,(no units),0.0,(no units),13.90 V,Voltage,240.0,(no units),
2,81.0,(no units),82.0,(no units),215.0,(no units),38.0,(no units),
3,221.0,(no units),226.0,(no units),222.0,(no units),40.0,(no units),
4,113.0,(no units),114.0,(no units),212.0,(no units),40.0,(no units),
5,24.0,(no units),19.0,(no units),227.0,(no units),23.0,(no units),
6,9.0°C,Temperature,20.0°C,Temperature,12.0°C,Temperature,0.0 %,Load,
7,0.0,(no units),35.0°C,Temperature,20.0°C,Temperature,85.0°C,Temperature,
8,6.70 V,Voltage,6.70 V,Voltage,18.8 %,Load,4.0 %,Load,
9,760 /min,RPM,0.0 km/h,Speed,0.0,(no units),N/A,,
10,0.0,(no units),1.0,(no units),0.0,(no units),0.0,(no units),


Gone But Not Forgotten
Jan 29, 2014
Reaction score
Montgomery, NY, USA
VCDS Serial number
Blend door Flap in box broken or with foam delaminated allowing a mix in any position.
  • Like
Reactions: Uwe