A pulse modulating heating system provides connection to a step heating system having a main heating controller configured for connection to a heat sensor and step heating relays connected to respective step heating element and for activating, during a heating cycle, a required quantity of mechanical relays and step heating elements to generate a required amount of heat. The pulse modulating heating system has inputs, one for each step heating relay, connectable to the main heating controller for detecting the relays activated during the cycle, i.e. the required quantity of relays. The pulse modulating system, based on the required quantity of step relays detected, activates a pulse heating element for a quantity of pulses relative to a maximum quantity of pulses for the cycle that is proportional to the required quantity of step relays relative the total number of step heating relays to generate the required amount of heat.