A device and a method for controlling the temperature of a unit to be controlled in its temperature, including a unit to be heated or cooled, a temperature-control circuit having a recirculatable, heat-transferring medium, the flow direction of the medium through the temperature-control circuit being reversed following at least one predefined time interval or according to a control based on a temperature of the unit to be controlled in its temperature, characterized by the fact that the intake temperature of the recirculatable, heat-transferring medium is higher than the setpoint temperature of the unit to be controlled in its temperature, as long as the actual temperature of the unit requiring temperature control is lower than its setpoint temperature, and the intake temperature of the recirculatable, heat-transferring medium is lower than the setpoint temperature of the unit to be controlled in its temperature, if the actual temperature of the unit to be controlled in its temperature exceeds its setpoint temperature.