Maximizing Supply Air Temperature Control in Semi-Automatic AC: Fabia 1 Engine Access & Solution

Hello,
the case looks like I have semi-automatic air conditioning in the car. At the moment the most hot air blows, regardless of the position of the knob. Sometimes, after driving on the road, it switches to the same temperature as it is set, but it can be stated confidently that the regulation does not work.

I found on the other forum all the instructions on how to get to this engine, but it is a lot of spinning and gouging. Is there any other way to get to the engine? Is this behind this plastic? (attachment)

marcin_xyz wrote:

There is maybe some other way to get to the engine

https://www.google.pl/search?q=szlifierka+k%C...ved=0ahUKEwjQl4jNvoLSAhUjCpoKHabkBuEQ_AUIBigB

fast yes

And calmly as your friends do.

And if anyone knows if such a motor will be good: 6Q0820536B 132801357, I found on the Allegro to Polo, but after the photos it looks the same as the one to the skoda