The electric boiler for heating and supplying hot water includes heating pot set comprising several connected heating pots in the boiler body of insulating material, water inlet pipe connected to the lowest heating pot, connecting pipe between every two heating pots, and water outlet pipe connected to the top heating pot with circualting water pump; water heaters and thermocouples inside different heating pots, electronic controller connected to the heaters, the thermocouples and the circulating water pump and remote controller; and bimetallic temperature regulator outside the heater. The present invention has the advantages of no corrosion, no frost crack, automatic fault detection, selectively on-off of the heating pots, set temperature modification, remote control and low cost. |