Refrigerating body of a road vehicle for transporting goods comprising: - an internal loading area, - a refrigerating machine for controlling the temperature inside said loading area according to at least one target temperature, - a control unit suitable for controlling the operation of the refrigerating machine - a device for closing of an access to said internal loading area, - at least one position detecting means for detecting an open position or a closed position of the closing device, - at least one determination means of the temperature of the air or the goods inside the loading area, and - at least one means (58, 60) for emitting visible and/or audible warning signals, characterised in that the refrigerating body further comprises: - an electronic processing unit which is separate from the control unit and which comprises means for calculating the temperature difference in absolute value between the determined temperature of the air or the goods and said target temperature, and a comparator of said temperature difference with at least one predetermined threshold temperature, - the electronic processing unit being suitable for activating a time delay of a predetermined duration T 1 when said temperature difference is greater than said predetermined threshold temperature, and - the electronic processing unit being suitable for controlling the activation of said means (58, 60) for emitting the warning signals when the predetermined time delay duration T 1 has elapsed and in the presence of a signal from the position detecting means representative of the open position of the closing device. - an internal loading area, - a refrigerating machine for controlling the temperature inside said loading area according to at least one target temperature, - a control unit suitable for controlling the operation of the refrigerating machine - a device for closing of an access to said internal loading area, - at least one position detecting means for detecting an open position or a closed position of the closing device, - at least one determination means of the temperature of the air or the goods inside the loading area, and - at least one means (58, 60) for emitting visible and/or audible warning signals, characterised in that the refrigerating body further comprises: - an electronic processing unit which is separate from the control unit and which comprises means for calculating the temperature difference in absolute value between the determined temperature of the air or the goods and said target temperature, and a comparator of said temperature difference with at least one predetermined threshold temperature, - the electronic processing unit being suitable for activating a time delay of a predetermined duration T 1 when said temperature difference is greater than said predetermined threshold temperature, and - the electronic processing unit being suitable for controlling the activation of said means (58, 60) for emitting the warning signals when the predetermined time delay duration T 1 has elapsed and in the presence of a signal from the position detecting means representative of the open position of the closing device. - an electronic processing unit which is separate from the control unit and which comprises means for calculating the temperature difference in absolute value between the determined temperature of the air or the goods and said target temperature, and a comparator of said temperature difference with at least one predetermined threshold temperature, - the electronic processing unit being suitable for activating a time delay of a predetermined duration T 1 when said temperature difference is greater than said predetermined threshold temperature, and - the electronic processing unit being suitable for controlling the activation of said means (58, 60) for emitting the warning signals when the predetermined time delay duration T 1 has elapsed and in the presence of a signal from the position detecting means representative of the open position of the closing device.