After last year no heating worked and it became so cold that even the plastic of the air shower has burst, I had the heating double valve changed. After changing the heating valve the air conditioning did not work any more, so it comes only hot air. The only adjustment in the cold air comes when I put on the air shower on the windscreen. After my nerves were blank, mi t the car, because in between other things were broken, I had the error memory measured today: Result: 0 errors. Then the coolant was checked: 30g lost in 2 years. So dense. The Kima compressor works, the heat exchanger is fine. Cold air only on the front window. I was told that most likely the actuators or also the actuator cap are. So what mechanical. Now my questions: 1. Is the assumption with the actuators true? 2 If yes, where can I find them and how can they be replaced? 3. Can the change of the broken double-heating valve have anything to do with it? Or is it a coincidence that after changing the same at once only heats up? 4.What more could it be? I thank you in advance for helpful answers. Best regards