Abstract: The invention relates to a wind turbine rotor blade heating process with a wind turbine rotor blade de-icing system arranged on a rotor blade (11), including modular heating elements (210, 211, 212, 213, 214, 220, 221, 222, 223, 230, 231, 232, 24) driven cyclically, recurring, intermittently and/or continuously, wherein at least one modular heating element (210, 211, 212, 213, 214, 220, 221, 222, 223, 230, 231, 232, 24) is provided with a temperature sensor and/or an electric resistance measuring sensor, with which a continuous measurement of the environment measurement values (U) is carried out and the wind turbine rotor blade de-icing system is activated upon reaching predetermined environmental measurement values (U), wherein upon reaching predetermined environment conditions (U), first, a measurement cycle is started, wherein a modular heating element (210, 211, 212, 213, 214, 220, 221, 222, 223, 230, 231, 232, 24) is driven, of which the temperature profile (f=dt (t)) is measured and compared with a heat