Method and device for controlling a variable in a heating system

A device for regulating a variable in a heating system contains a first regulator (101) for regulating the variable and a second regulator (102) for regulating the variable, the first (101) or the second regulator (102) regulating the variable and Operation is transferred from one (101, 102) to the other controller (102, 101), and a device (103) which, during the transition to reducing the overshoot of the controlled variable, the target variable (Kset) and / or the control difference (Kdiff) changed. A method for preparing a control variable for controlling an actuator (104) calculates a control variable (Tan) determined by a control with an intermediate variable (Tz) to a new intermediate variable (Tnew), compares the new intermediate variable (Tznew) with a minimum actuating variable (Tmin) and determines a control output variable (Taus) for controlling the actuator if the new intermediate variable (Tzneu) is greater than the minimum control variable (Tmin).