Method for controlling the temperature of multiple rooms heated by a heating system, wherein the heating system comprises at least one heating device for heating a heat carrier medium, multiple radiators provided in multiple rooms and a distribution system (13, 14) for distributing the heat to the rooms (5, 6), and wherein a temperature sensor for measuring the room temperature, a control valve for defining a heat carrier mass flow through the radiator and a control device is associated with each room (5, 6) to be controlled, with the cyclic method steps (a) requesting heat by a room (5, 6) as soon as the room temperature in this room falls below a lower threshold value, (b) operating the heating device and providing heated heat carrier medium in response as soon as one of the rooms (5, 6) has requested heat, wherein the control valves of all rooms are opened to an individual degree of opening, (c) withdrawing the request by the room (5, 6) as soon as the room temperature in this room has exceeded an upper threshold value, (d) interrupting operation of the heating device and providing heated heat carrier medium as soon as all rooms (5, 6) have withdrawn the request for heat, (e) if the temperature of a room (5, 6) has exceeded the upper threshold value, but heated heat carrier medium is still being provided: closing the control valve of this room as long as heated heat carrier medium is being provided, (f) for each room (5, 6): after interrupting the provision of heated heat carrier medium, determining the heat quantity ratio of the heat quantity required to reach the upper threshold value and the heat quantity provided by the heat carrier medium, and defining the degree of opening of the control valve in dependence on the heat quantity ratio, characterized in that further (g) the cycle ratio of the activation time between step (a) and step (d) and the deactivation time between step (d) and step (a) of the next cycle is determined and output of the heating device is reduced until the minimum output is reached that can continuously be provided by the heating device, without the deactivation time being 0, or until the deactivation time is 0, and wherein, while the deactivation time is 0, in step (b) the output of the heating device is further controlled such that the temperature of the room (5, 6), in which the control valve has the largest degree of opening, lies between the upper and the lower threshold value. (a) requesting heat by a room (5, 6) as soon as the room temperature in this room falls below a lower threshold value, (b) operating the heating device and providing heated heat carrier medium in response as soon as one of the rooms (5, 6) has requested heat, wherein the control valves of all rooms are opened to an individual degree of opening, (c) withdrawing the request by the room (5, 6) as soon as the room temperature in this room has exceeded an upper threshold value, (d) interrupting operation of the heating device and providing heated heat carrier medium as soon as all rooms (5, 6) have withdrawn the request for heat, (e) if the temperature of a room (5, 6) has exceeded the upper threshold value, but heated heat carrier medium is still being provided: closing the control valve of this room as long as heated heat carrier medium is being provided, (f) for each room (5, 6): after interrupting the provision of heated heat carrier medium, determining the heat quantity ratio of the heat quantity required to reach the upper threshold value and the heat quantity provided by the heat carrier medium, and defining the degree of opening of the control valve in dependence on the heat quantity ratio, characterized in that further (g) the cycle ratio of the activation time between step (a) and step (d) and the deactivation time between step (d) and step (a) of the next cycle is determined and output of the heating device is reduced until the minimum output is reached that can continuously be provided by the heating device, without the deactivation time being 0, or until the deactivation time is 0, and wherein, while the deactivation time is 0, in step (b) the output of the heating device is further controlled such that the temperature of the room (5, 6), in which the control valve has the largest degree of opening, lies between the upper and the lower threshold value.