When your central heating system works well it will run quiet and smoothly. If you start to hear noises from your heating system, it can be an indication that there is a problem. A noisy system is also irritating and can interrupt sleep and other relaxing activities. The best way to determine the source of the problem is by doing some easy troubleshooting. Below you find a few things to check when attempting to troubleshoot a noisy central heating system.
If you hear creaking noises coming from the floor or walls when your heating system is running this could indicate problems with the pipes below the floor boards or within the walls. As hot water travels from your boiler through the walls, it causes the pipes to expand. As the water cools the pipes will then contract back to their normal size. If the expanded pipes fit too tight to the floor you will hear the creaking noise as they expand and contract. Locate the source of the noise and inspect the pipes in that area. If the pipes are sagging try placing a piece of felt around the pipes in that area to create a better fit. If the pipes are too tight attempt to cut a notch in the surface to create more space for the pipes to expand. Make sure the pipes are not touching, if so again use the felt to create separation between the pipes.
Banging sounds in the boiler are created when the flow of water is stopped too quickly. When the flow of water is stopped abruptly it creates waves in the pipes cause the banging noise. The noise will often continue until the waves settle. If your system has a faulty stop-cock, taps, or ball valve this can prevent the water from flowing through the system smoothly. If you check all of these elements and still hear the banging noise, check the water flow to ensure that it is not moving too fast.
Humming sounds come from your heating system usually originate in the pump. First check to the speed of the pump. If it is set too high that may be causing the problem and can be easily adjusted. If this does not work, next replace or install anti-vibration brackets to correct the noise. If these two steps don't correct the humming sound in may be the size of the pipes. If the pipes are too small to accommodate the amount of water they are carrying it can also create the humming sound. To install larger pipes you may need to seek the help of a professional.
When troubleshooting your central heating system always make sure to perform the necessary safety precautions to avoid injury. If the troubleshooting tips above do not help to correct the problem, you may need to consult a professional.