Control device for controlling an electric heating circuit including a number N of heating elements that are connected in parallel, the control device including: - N electronic switches (T 1 -T 3), each one being capable of being connected in series with one of the N heating elements; - an electronic receiver module that is capable of receiving a power setpoint in the form of a PWM control signal having a duty cycle that varies with power; - means for extracting a mean value from the received pulse-width modulation control signal, such as a low-pass RC filter having a time constant that is much higher than the period of the signal; - P comparators (C 1 -C 3), the integer P being smaller than or equal to N, that are capable of comparing the extracted mean value with P distinct threshold values (Ref 1 - Ref 3) and generating P comparison signals (S 1 -S 3), each comparison signal being used to control an operation of switching the electronic switch (T 1 -T 3) that is associated with at least one heating element to an open or closed position, each comparator (C 1 -C 3) having its output connected to the input of the switch (T 1 -T 3) and each comparator (C 1 -C 3) is capable of delivering a comparison signal (S 1 -S 3)that is capable of: - controlling (122, 132, 142) an operation of switching the associated electronic switch to the open position if the extracted mean value is lower than the threshold value; - else, controlling (121, 131, 141) an operation of switching the associated electronic switch (Ti) to the closed position; - means for generating the P threshold values (Ref 1 - Ref 3), said generating means comprising a divider bridge with P+1 resistors in series, under a reference voltage, each point of connection between two resistors of the divider bridge resulting in a threshold value that increases between two successive points of connection. - N electronic switches (T 1 -T 3), each one being capable of being connected in series with one of the N heating elements; - an electronic receiver module that is capable of receiving a power setpoint in the form of a PWM control signal having a duty cycle that varies with power; - means for extracting a mean value from the received pulse-width modulation control signal, such as a low-pass RC filter having a time constant that is much higher than the period of the signal; - P comparators (C 1 -C 3), the integer P being smaller than or equal to N, that are capable of comparing the extracted mean value with P distinct threshold values (Ref 1 - Ref 3) and generating P comparison signals (S 1 -S 3), each comparison signal being used to control an operation of switching the electronic switch (T 1 -T 3) that is associated with at least one heating element to an open or closed position, each comparator (C 1 -C 3) having its output connected to the input of the switch (T 1 -T 3) and each comparator (C 1 -C 3) is capable of delivering a comparison signal (S 1 -S 3)that is capable of: - controlling (122, 132, 142) an operation of switching the associated electronic switch to the open position if the extracted mean value is lower than the threshold value; - else, controlling (121, 131, 141) an operation of switching the associated electronic switch (Ti) to the closed position; - controlling (122, 132, 142) an operation of switching the associated electronic switch to the open position if the extracted mean value is lower than the threshold value; - else, controlling (121, 131, 141) an operation of switching the associated electronic switch (Ti) to the closed position; - means for generating the P threshold values (Ref 1 - Ref 3), said generating means comprising a divider bridge with P+1 resistors in series, under a reference voltage, each point of connection between two resistors of the divider bridge resulting in a threshold value that increases between two successive points of connection.