Why is the heating in Shangying Lijing not good?

The reason why the heating of Shangying Lijing is not good may be that the pipes have not been cleaned for a long time, which has caused the problem of blockage, which is also a common problem in many families. It may have appeared at the beginning, because it takes some time for the heating temperature to rise, especially these days. If the pipeline heating is not hot, it is common, so just wait quietly. The heating system is connected in parallel, which is not hot and has many problems.