Adjustment apparatus for self-regulating adjustment of a flow control valve of a consumer loop comprising a heat exchanger, in particular in a temperature regulating system for buildings having a temperature regulating source, a liquid heating medium and a pump, wherein the adjustment apparatus comprises: an actuator which is configured so as to be able to be coupled to the flow control valve such that an opening position of the flow control valve can be adjusted and detected between a closed position (S V min) and an open position, in particular gradually or in steps, by means of the adjustment apparatus; temperature detection means which detect a supply temperature (T supply), which is on the input side in relation to the consumer loop, and an output-side return temperature (T return) of the through-flowing heating medium; wherein a calculation means which is configured to calculate an activation of the actuator which corresponds to a predetermined opening position - allocated to a specific flow cross-section - of the flow control valve such that a temperature difference (ΔT actual) from the detected input-side supply temperature (T supply) and the output-side return temperature (T return) is brought up to a predetermined temperature spread (ΔT desired) from the output-side return temperature (T return) to the input-side supply temperature (T supply), and the adjustment apparatus detects a flow through the flow control valve based upon a temperature change of the heating medium in the consumer loop; characterized in that the adjustment apparatus is configured to determine a hydraulic minimum opening position (S V-hydraulic-min) of the flow control valve, at which a minimum flow can be detected, along an actuating travel path; and the determination of the hydraulic minimum opening position (S V-hydraulic-min) comprises iterations of different opening positions along the actuating travel path of the flow control valve; each iteration of an opening position of the flow control valve comprises at least one detection of the flow through the flow control valve; and the determination of the hydraulic minimum opening position (S V-hydraulic-min) extends over a plurality of external temperature regulating requests to the consumer loop, and missing iterations of the determination which are still pending after deactivations of the adjustment apparatus between the temperature regulating requests are continued during renewed activations of the adjustment apparatus. an actuator which is configured so as to be able to be coupled to the flow control valve such that an opening position of the flow control valve can be adjusted and detected between a closed position (S V min) and an open position, in particular gradually or in steps, by means of the adjustment apparatus; temperature detection means which detect a supply temperature (T supply), which is on the input side in relation to the consumer loop, and an output-side return temperature (T return) of the through-flowing heating medium; wherein a calculation means which is configured to calculate an activation of the actuator which corresponds to a predetermined opening position - allocated to a specific flow cross-section - of the flow control valve such that a temperature difference (ΔT actual) from the detected input-side supply temperature (T supply) and the output-side return temperature (T return) is brought up to a predetermined temperature spread (ΔT desired) from the output-side return temperature (T return) to the input-side supply temperature (T supply), and the adjustment apparatus detects a flow through the flow control valve based upon a temperature change of the heating medium in the consumer loop; characterized in that the adjustment apparatus is configured to determine a hydraulic minimum opening position (S V-hydraulic-min) of the flow control valve, at which a minimum flow can be detected, along an actuating travel path; and the determination of the hydraulic minimum opening position (S V-hydraulic-min) comprises iterations of different opening positions along the actuating travel path of the flow control valve; each iteration of an opening position of the flow control valve comprises at least one detection of the flow through the flow control valve; and the determination of the hydraulic minimum opening position (S V-hydraulic-min) extends over a plurality of external temperature regulating requests to the consumer loop, and missing iterations of the determination which are still pending after deactivations of the adjustment apparatus between the temperature regulating requests are continued during renewed activations of the adjustment apparatus.