Hydraulic fan control

The invention relates to a hydraulic fan control, consisting of at least one fan motor (10), a pressure supply device, in particular a hydraulic pump (12), for supplying the fan motor (10) with a pressure medium, in particular in the form of hydraulic oil, and a thermostatic valve (40) controlling the regulation of the fan motor speed, which is characterized in that the thermostatic valve (40) comprises an energy storage device, preferably in the form of a compression spring (48), consisting of a shape memory alloy.