What are the general problems with solar water heaters

If there is water in the heat preservation water tank, it means that the water is not hot. If there is water in the exhaust pipe of the heat preservation water tank, there is hot water in the water pipe when adding water. If there is hot water in the cold water pipe when taking a bath, the water temperature is too high to adjust when taking a bath in the room. If there is a problem with the solar water heater, if there is no problem in the service provider If it can be solved in time, we need to use it urgently, so we can refer to the following directions provided by Kunming solar energy manufacturers to solve the crisis of temporary solar water heater.