T6 Caravelle: Top-area cooling, bottom-area heating.

Hello to the forum,
When I press the "Auto Climate" button in my T6, the air comes out cold from the top and the side. However, when I press the button for air from the footwell (bottom), hot air comes out from the bottom as well. I have performed the initial setup of the stepper motors.
I was planning to replace the stepper motors, but maybe the control unit is also defective. How can I check it with VCDS?
For information, I would be very grateful.
Greetings, Wolfgang

Is there anything stored in the error memory?

Autoscan?

Possibly, there is also a software update for the air conditioner, I have already read about this problem specifically for the T6.
Can you also tell me which software the Climatic issue does not occur in:

Quote:

Address 08: Climate/Heating Control (J301) Label file:| DRV\7E5-907-047.clb Part Number SW: 7E0 907 047 AC HW: 7E0 907 047 AC Part: Climatic-T5 H22 0708 Revision: 00001002 Encoding: 0000000003 Operating Number: WSC 02762 790 50316 ASAM Dataset: EV_ClimaticT5 A01003 ROD: EV_ClimaT5Basis.rod VCID: 6B80CDC1D30379FFB43-803E No error codes found.

Best regards, Rainer

Hello Andreas and Rainer,
Thank you for your help.
I had a car scan today. Because of a coolant leak, I took my T6 to VW four weeks ago. The AGR cooler was replaced, and I requested an update to the climate system.
To reset the ventilation motors to their default settings, I had to pay VW €78. Picked up the car after 1km. Info
in the "Front Assy" display, not available. Klima Update has not helped, still experiencing "cold air at the top and hot air at the feet."
Two weeks later, an Autscan was performed using VCDS.
Error: Distance control sensor not set up
Error: Rest current too high
Stopp motor temperature control lever on the right is hanging.
Error 0018 External Data Bus - Coolant Temperature -48°C Temperature Sensor Defective?
When I adjust the climate controls to "Front Windshield," "Middle," and "Feet," cold air comes out.
I need to adjust the air circulation and temperature myself.
eistellen. Vielen Dank für eure Hilfe. Wolfgang

There are two errors to be corrected:

1. the hanging motor
I would remove and disassemble the starter motor. Possibly, a re-lubrication of the mechanical components may be sufficient.

2. Find out why the leakage current is high
Check if cable insulation is damaged or, when pulling out each fuse, use a fuse puller to determine which component is the cause.

The space heater is also displaying an electrical error. Does it even work?

Hello Andreas,

Thank you for the quick response. The hanging auxiliary motor on the right side is not the problem. When I manually operate the footwell flap, it cools wonderfully, but the automatic system only releases heat. The original ZH auxiliary heater has been upgraded to a SH and runs perfectly every morning. That's why there's a high idle current. What about the external data bus -48°C greetings from Wolfgang?

Schmierpfote wrote:

The electric seat motor on the right side is not the problem. When I manually operate the footwell cover, it cools wonderfully. However, when the automatic system is activated, only heat comes out.

Why should this error be saved, if the actuator is functioning correctly? Perhaps the climate control system cannot function properly if an error is detected. I would first fix this error and then check again.

Schmierpfote wrote:

What about the external data bus -48°C

I don't know.

Hello Andreas, Thank you for your response, I will take care of the starter motor. Thank you, Wolfgang.

Hi!

The -48°C is also visible in the error ranges when my space heater starts up via remote control and generates some kind of error.
However, I also control my heating system using a mobile phone module. I suspect the bus in the vehicle is also sleeping.
Try to see if the error also occurs if you don't start the heater.

LG
Brezelmann01

Hello Brezelmann, thank you for your response.
I upgraded the ZH with a clock and remote control, and it has always worked until the AGR cooler was replaced at VW. After the repair, I picked up the T6, and the system is complaining that the front assembly is not available. They apparently drained the battery overnight and still wrote it on the invoice - "battery charged". I drive many kilometers, and the battery is always fully charged for me. I performed a VCDS scan and showed it to the master. The master confirmed that the front assembly sensor screws were loose. When I updated the air conditioning system, VW reset the motors to the default settings, and the error was cleared. I paid 78 euros. VW even managed to fix the taxameter during the second window repair on the Touran. No electrician available in the house, so a 2-day waiting time.
I'm tired of dealing with VW junk.
Happy Sunday, Wolfgang

Schmierpfote wrote:

I'm done with VW junk.

Even for unskilled workers in the workshop, the car may not be able to help. Is it possible to switch to another VW workshop?