Heating/cooling device having opportunity for testing and method for testing a heating/cooling device

The invention relates to a heating/cooling device for carrying out a heating/cooling programme for at least one sample, in particular a PCR sample, comprising: at least one heating/cooling block which is constructed for receiving the at least one sample, at least one heating/cooling unit which is arranged for heating/cooling the at least one heating/cooling block, at least one temperature measuring unit which is assigned to this heating/cooling unit, at least one control circuit for controlling a temperature, to which control circuit are assigned at least one heating/cooling unit and at least one temperature measuring unit assigned to this at least one heating/cooling unit, at least one control unit which is constructed for controlling the heating/cooling of the at least one heating/cooling block, wherein the heating/cooling device comprises at least two temperature measuring units which are assigned to at least one control circuit, and a test unit for carrying out a test method is assigned to the heating/coo