The following paper sets out a simulation model of the method of ice thickness measurement on railway contact wires. The method is based on the asynchronous heating of two sensitive elements (SE) with a time difference between the switching on of each element. The determination of ice thickness is achieved through the analysis of the duration of the phase transition of ice into water. Methods: the classical theory of thermal conductivity was used in the construction of the heat transfer equation. A software model was implemented in the MATLAB environment, and calculations were performed of the dependence of melting time on heater power and ambient temperature. The paper presents the results of the modelling, the scientific novelty of the method and its practical application. Purpose: to develop a simulation model of a method for asynchronously determining the thickness of ice on the surface of contact wires. This methodology enables the calculation of ice thickness, incorporating the impact of external factors such as ambient temperature and heater power. The approach involves the development of a software model and the validation of this model through numerical experimentation. Practical significance: the utilization of simulation software facilitates the modelled operation of a sensor designed for the detection of ice or snow on a controlled surface, thereby offering the potential to address numerous scientific and practical issues.