Aircon cooling only on driver side, LHD car

[Prototypen]

Last year I changed the high-pressure sender G65 and temperature sender G263, after that the aircon was working perfect.
Now when the heat returns ( I live in Portugal and we now have 27-30 degrees C).
I have checked the fault codes and have two which basically are the same problem.
Engine
18043 - Powertrain Data Bus
P1635 - 35-10 - Missing Message from A/C Controller - Intermittent
Instruments
Readiness: 0010 0101
01320 - Control Module for Climatronic (J255)
49-10 - No Communications - Intermittent

When it´s 25 deg outside I have approx 15 deg in the centre air outlet, 2 deg on driver side outlet (LHD car) and basically outside temp on passenger side.
Temp measured with laser thermometer.
How can it be very cold air on driver side and nothing on passenger side? Can it be some flaps inside the air-ducts that not working?
Any idea where to start? Yes I will check all connectors at centre console control and control module for climatronic.
But I don't believe that is the problem for the non cooling on the passenger side?

 

[bretti_kivi]

You're 100% sure the vent is actually open? Taking the glove box out may help to understand but not much. I don't remember if the V68 temperature flap is split. But your errors imply that it's "working correctly", I suspect that the flap itself has come ´loose on one side, which is going to be a pig of a job to fix.

- Bret

 

[Prototypen]

Any one have a illustration on the air-duct system for a LHD car? Just as a help to find position and function for the different flaps. Was checking the temps one more time today.
Lefthand side (driver side) - 3,9 C
Middle 3,2 C
Righthand side (Passenger) 13,9 C

 

[audifan]

Perhaps this manual page may show what you need.

air and footwell heater ducts, air hoses and vent... Audi A2 (A2) 2001 year Audi EUROPA 819030

air and footwell heater ducts, air hoses and vents<br/>water deflector Audi A2 (A2) 2001 year Audi EUROPA 819030 spare parts

audi.7zap.com

and this.

evaporator housing; air distribution housing; evap... Audi A2 (A2) 2001 year Audi EUROPA 820010

evaporator housing<br/>air distribution housing<br/>evaporator<br/>fan Audi A2 (A2) 2001 year Audi EUROPA 820010 spare parts

audi.7zap.com

 

[Prototypen]

Thanks "audifan", today it was warm inside the car when I was going for shopping! Yes it's C not F!

 

[audifan]

Look for a disconnected duct or blockage in a duct.

 

[bretti_kivi]

the only pic I've found which shows any of this is this auction's pictures: https://www.ebay.de/itm/183669582512?ul_noapp=true

From that, it's a seperate duct to the outside vents. I would check that teh vent really is open before taking the dash out, because that's not a trivial job. Not hard, but time-consuming.

- Bret

 

[Prototypen]

Finally I got to check the fault codes:

01273 - Fresh Air Blower (V2)
17-10 - Control Difference - Intermittent
As there are two inside temperature senors one left and one right I have a feeling that the right one is out of order? It can also be a bad connection but I will order a new sensor for to change it. I had one of them out when I changed the G263? sensor last year.

 

[spike]

There is a LHD schematic available which may help if further investigation is required

Cabin temperature issues

Looking to try and get ideas if I have an issue or not, and if so what could be causing the problem. So just had a few things replaced and the mechanic has cc unit set at 28 degrees when I picked it up..very toasty. So immediately turned down to setting "lo" and the cabin was quickly filled...

www.a2oc.net

Cheers Spike