Servus together!I own a Seat Leon 1P with the 1.8TSI from 07/2009.Today I changed the cooler, because it was leaking and had dripped. I ventilated as follows: Run the engine warm, heat on the highest level and with warm engine then the hoses slightly pressed together until the coolant has remained constant and no air bubbles have survived. Now I have the problem, however, that if I drive with the car and the heater on the highest level If I set the heating to a normal temperature of 22 degrees, it goes back to 90 degrees. In addition, the heating of “LO-26 degrees” does not heat (feeling cool air comes out) and only as soon as it stands on high does the extremely warm air come out. Do you know this problem?If air in the system, then it wouldn’t heat extremely on HIGH, would it?