Possible weakness in the thermostat which make the heaters cut off at a earlier state. So try to check the machine for any loose connection to the lines, the heaters or else the switch and thermostat must be looked into .
As well as loose connections on the heating elements it may also be the thermal sensor (feeler as called by Delonghi) that is faulty. There are two of these, one on each of the heaters, and when the unit is cold (at room temperature) they should measure about 120K ohms. The heating elements measure about 50 ohms when cold. Cooler hot milk is caused by the smaller (horse-shoe shaped) unit at the back and cooler coffee is due to the main heater (large block at the top referred to as the Generator).
Answers & Comments
Possible weakness in the thermostat which make the heaters cut off at a earlier state. So try to check the machine for any loose connection to the lines, the heaters or else the switch and thermostat must be looked into .
As well as loose connections on the heating elements it may also be the thermal sensor (feeler as called by Delonghi) that is faulty. There are two of these, one on each of the heaters, and when the unit is cold (at room temperature) they should measure about 120K ohms. The heating elements measure about 50 ohms when cold. Cooler hot milk is caused by the smaller (horse-shoe shaped) unit at the back and cooler coffee is due to the main heater (large block at the top referred to as the Generator).