The temperature controller is a very important safety component of an electric water heater. It can monitor the water temperature of the water heater through a temperature sensor and maintain the water temperature within a set range by controlling the switch of the heater. If the water temperature reaches the set maximum temperature, the temperature controller will automatically turn off the heater to prevent danger caused by excessive water temperature.

The heater of an electric water heater is usually composed of a set of electric heating tubes, which are made of a metal material that can withstand high temperatures, such as stainless steel or copper. These electric heating tubes are installed inside the water heater, converting electrical energy into thermal energy through resistance, thereby heating the water. The power of the heater can usually be set at the factory or selected by the user according to their own needs when purchasing.