One, how to clean the scale in the electric heating boiler.
1、Add siliphos to the filter. Siliphos is a specialized water softener, which absorbs scale buildup from the heating system after the water passes through the inlet pipe.
2. Install a filter inside the water pipe to trap impurities and sediment. This will also help to remove some scale buildup. However, regular filter cleaning will improve its performance.
3. When adding water, you can use a softening agent to completely remove impurities and scale, effectively preventing the formation of scale in electric heating appliances.

Two. Method for cleaning electric heating appliances
1. Disconnect the power plug and simultaneously close the cold and hot water valves located below the electric heating unit. Remove the restriction device at the valve wrench position, and connect a plastic pipe to the outlet of the pressure relief valve to drain the inner tank water. Rotate the pressure relief valve wrench 90 degrees from the vertical position, which will open the valve.
2. Remove the metal pipe joint at the hot water outlet. As water begins to flow out of the pressure relief valve, the inner tank starts to drain. Typically, this process can remove approximately 40 liters of water per hour. The exact draining time will depend on the specific features of your boiler.
3. Connect the flexible hose of the cold water pipe to the hot water outlet of the electric water heater. Open the cold water valve and allow cold water to flow from the cold water pipe into the inner tank, starting the flushing process. At this point, wastewater continues to flow from the vent valve outlet. Continue flushing until all the water is completely clean.
4. Restore the pressure relief valve to its original position, and connect the cold water pipe to the cold water valve and the hot water pipe to the hot water valve.
5. Open both the cold water and hot water valves. After opening the hot water tap connected to the hot water pipe, allow hot water to flow and then close the tap. Ensure that the electric heating unit's inner tank has been completely emptied of air and filled with water.