Before heating, you can use warm water for 1 hours, now only 25 minutes after heating, the water completely cool! There is also a black stain in the pipe. What's the cause of this?
If the hot water, big and small, accompanied by a similar sound of air flow, but mostly due to the water tank caused by too much scale, should promptly clean up the water tank scale.
There are three ways to scale the water tank of the water storage electric water heater:1, some water heaters under the water tank with a dedicated sewage nut, the water heater directly to the sewage nut screw off, you can drain the sewage. When the water in the tank is finished, the water in the tank will be brought out. After the water is finished, the nut is screwed on, and then some water is added to the water tank, and then the water outlet nut is screwed out, so that the scale in the water tank can be cleaned again and again several times.2, some water heaters can adjust the angle of the safety valve to discharge water, but the water is too slow, the effect is not good;3, there is no special sewage nut water heater, it is best to take the right side of the safety valve of the water pipe and safety valve to remove water, sewage.Before cleaning up the scale, it is better for users to read the instructions of the water heater in detail.You should check the instructions for the heater. There should be a specific method for cleaning the scale.
If cleaning scale or not, mostly due to the temperature control circuit failure caused.
