The plug and socket of the electric water heater are burnt out at the same time. Please consider the following reasons:

1, remove the power socket, check whether the internal copper sheet is aged, deformed or not firmly fixed, and reshape and fix the copper sheet or replace it with a new power socket;

2. Check the model of power socket, whether it can be equipped with electric water heater, and whether there is long-term overload operation. For example, if it is overloaded for a long time, the copper sheet of the socket will be deformed and short-circuited. Consider changing the power socket to a larger model.