Method for de-icing a transparent window with an electric heating device which comprises, on the basis of a manual or automatically initiated de-icing process, the following steps: Step A): Measuring the window temperature before the initial application of a heating voltage, wherein the method is terminated if the window temperature exceeds a lower temperature threshold value, or a heating voltage of more than 100 volts is applied to the heating device over a heating period of a maximum of 2 minutes, if the window temperature is equal to or less than the lower temperature threshold value, wherein the heating voltage and the heating period are selected such that a heating power of at least 2 kilowatts (kW) per square meter (m 2) of window area is generated, and step B) is executed, wherein in step A) the duration of the heating period is selected as a function of the window temperature measured in step A), with a shorter heating period selected in the case of a higher window temperature and a longer heating period selected in the case of a lower window temperature. Step B): Measuring the window temperature after the beginning of the heating period, wherein the de-icing process is terminated if the window temperature reaches an upper temperature threshold value, or step C) is carried out if the window temperature is lower than the upper temperature threshold value; Step C): Applying a heating voltage of more than 100 volts to the heating device over a heating period of a maximum of 2 minutes with the heating voltage and the heating period selected such that a heating power of at least 2 kilowatts (kW) per square meter (m 2) of window area is generated, and repeating step B), wherein in step C) the duration of the heating period is selected as a function of the window temperature measured in step B), with a shorter heating period selected in the case of a higher window temperature and a longer heating period selected in the case of a lower window temperature. Step A): Measuring the window temperature before the initial application of a heating voltage, wherein the method is terminated if the window temperature exceeds a lower temperature threshold value, or a heating voltage of more than 100 volts is applied to the heating device over a heating period of a maximum of 2 minutes, if the window temperature is equal to or less than the lower temperature threshold value, wherein the heating voltage and the heating period are selected such that a heating power of at least 2 kilowatts (kW) per square meter (m 2) of window area is generated, and step B) is executed, wherein in step A) the duration of the heating period is selected as a function of the window temperature measured in step A), with a shorter heating period selected in the case of a higher window temperature and a longer heating period selected in the case of a lower window temperature. Step B): Measuring the window temperature after the beginning of the heating period, wherein the de-icing process is terminated if the window temperature reaches an upper temperature threshold value, or step C) is carried out if the window temperature is lower than the upper temperature threshold value; Step C): Applying a heating voltage of more than 100 volts to the heating device over a heating period of a maximum of 2 minutes with the heating voltage and the heating period selected such that a heating power of at least 2 kilowatts (kW) per square meter (m 2) of window area is generated, and repeating step B), wherein in step C) the duration of the heating period is selected as a function of the window temperature measured in step B), with a shorter heating period selected in the case of a higher window temperature and a longer heating period selected in the case of a lower window temperature.