1. Turn off the power supply, turn off the water inlet switch, unscrew the water inlet and outlet pipes, and drain the water in the thermal electric water heater.
2. Remove the water heater from the wall and put it on the ground. Remove the round plastic cover to expose the circuit structure, take photos with your mobile phone, and remember the connection of each line and structure.
3. Disconnect the wire connected to the flange of the electric heating tube base, unscrew the large screw fixing the flange in the middle, push the flange and the electric heating tube in, and gently take it out. Note: When unscrewing a large fixing screw with one hand, hold other screws or electrical connectors with the other hand to prevent the electric heating tube components from falling into the liner and breaking, and act gently to avoid damaging the electric heating tube and other components. At this time, the cause and location of water leakage can be seen. Generally, the sealing ring on the flange of the electric heating pipe base is broken, and then a new sealing ring is replaced.