good night I would like to make an inquiry I have a problem with the heating command of the vehicle mentioned since I move the lever to select heat or cold and does not modify the opening of the heating hopper and I would disarm the part of the command but I do not know how do as I search for videos and I do not find here I leave an image of the front to see the model

the palanquita would be the one that is located down from already many thanks and I hope some answers GREETINGS