Climatronic Golf IV - Unauthorized adjustment of fan speed

Hello!

"When the outside temperature is very low, I always manually set the ventilation level to 1 during the warm-up phase – the 'AUTO' setting disappears from the display. However, after a short time, I notice that the ventilation level has been increased again to 3, or sometimes even 4." You often have to lower the temperature setting a few times before the climate control system "gives in."

The Climatronic system in my older Golf IV (2000 model) definitely didn't do that (in that system, the 'AUTO' setting would only disappear from the display when more than one level was adjusted; now it disappears immediately). I believe that the manually set level is being overridden by the automatic adjustment based on the engine temperature.

-> Bug or feature (it definitely annoys me, though)?

Hi,

You're absolutely right. At some point, VW or the manufacturer of the control unit changed the software so that it no longer displays the 6 or 7 different fan settings statically, but instead dynamically shows the actual fan level currently selected by the controller. My G III used to behave like your G IV from the year 2000.

I observed that even in the older systems, the fan speed would still vary, even though the lowest setting was selected and displayed. Therefore, in my opinion, only the display has changed, not the actual fan control.

"On my 2002 G IV, I use the following method: When the engine is cold, I set the target temperature to 18 degrees (the lowest regulated temperature). As soon as the system starts running the fan at a higher speed after a short drive, I manually set the fan speed to the lowest setting. I do this until the engine is warm. This works quite well so far. Once the engine is warm, to get any heating effect, you either have to set the target temperature higher or set the fan to level 4." From then on, everything will be regulated again.

For future generations, it should simply be easy with just one button for TDI winter operation, so you don't have to constantly mess with the automatic transmission .

Thank you for the explanation!

Quote:

For future generations, it should simply be easy with just one button for TDI winter operation, so you don't have to constantly "mess with" the automatic transmission.

One naturally wonders what the purpose of an "AUTO" button is... If 'AUTO' is not selected, I think nothing should be automatically adjusted; alternatively, the temperature setting display could be replaced with '--'.

I completely agree.

That thing, as you describe it, and which bothers me just as much, I've only experienced since I started using this vehicle.

I will not tolerate any unauthorized actions, and I'm satisfied as long as he maintains a consistent temperature.

It's like this: once the coolant temperature reaches a certain point, the automatic system thinks it can blow hot air as much as it wants.

But that stuff (a highly efficient gasoline car diesel engine) just can't handle it!

...and the longer it will take to warm up, and it might not even warm up enough to be comfortable by the time you get to work.

Please provide the text you would like me to translate from German to English.

Does anyone know if it's possible to 'deactivate' or 'recode' the Climatronic system, and if so, how?