In the event of a water leakage outside the heater, there is damage inside the heater tank or a malfunction in the heater responsible for heating the water. In the event of a fire or melting of the plugin, the electric heater means water leakage inside the plug, which means a danger that requires maintenance by the responsible technician. Not heating the water entirely inside the heater means complete damage to the heater's components responsible for operation and heating.