Heating system is the key to the safe, efficient performance of electric hot water heater. Water leakage is thermoelectric water heater core heating technology to solve the key where electricity guard, line control system of safety testing, leakage protection function and external leakage protection switch is also playing a role, but more of a stopgap. Modern awareness of the safety requirements is to achieve hundred percent home safe, so how to solve the heating system hot water leakage, leakage, scale, dry heating and other safety issues as the electric water heater industry a top priority