An extracorporeal blood treatment apparatus (1) comprising a control unit (10) connectable to a blood warming device (200) and configured to issue a control signal for the blood warming device, wherein the control signal comprises a command directed to impose to the blood warming device (200) a modality of operation depending upon an identified mode of current operation of the blood treatment apparatus. A method for controlling the blood treatment apparatus (1) and an assembly including the blood treatment apparatus (1) and the blood warming device (200) are also disclosed.
