1, insufficient circulating power and water pressure. There will be a certain water pressure in the inlet pipe and return pipe. Use water pressure to circulate hot water. If the water pressure is insufficient and hot water cannot flow into return pipe, there will be a phenomenon that return pipe heats cold water.

Solution: increase circulating power and water pressure.

2, backwater pipe slope is not enough. If the pressure in the floor heating loop is insufficient, it may lead to poor water circulation and cold in return pipe.

Solution: Increase the slope of return pipe.

Extended data

The advantages of floor heating are uniform heating and comfortable living conditions, while the disadvantages are slow heating and complicated installation procedures. Because the floor heating is generated by the whole ground, the heat dissipation is relatively uniform, so the indoor temperature difference is relatively small, which is more suitable for living and more comfortable. And because floor heating will make your head cool and your feet warm, it is more in line with Chinese medicine. But the disadvantage is that the height is too high, about 5.5 cm.

Moreover, when floor heating is used, it takes a long time to make a cement layer on the hot water pipe, then heat the air on the floor, and finally reach the predetermined temperature. At the same time, the installation of floor heating requires layers of processes, which are complex and difficult to repair once damaged.