Method and device for drying an evaporator and method for controlling an air condtitioning system

The method for the drying of an evaporator (3) of an air conditioning unit (1) in a vehicle, especially after the vehicle has stopped, entails charging an evaporator installed in a cooling medium circuit (KK) with the residual heat of heater (7) on the primary side. The evaporator on the secondary side is charged with air guided and heated through the heater. For the heating of the air, especially of climatized air, the airflow direction inside the air conditioning unit is reversed. An independent claim is included for a device for the drying of an evaporator of an air conditioning unit in a vehicle by the application of the proposed method.