why does my central heating make a banging noise
Why does my central heating make a banging or knocking noise? Less common now than it was 20 years ago, central heating knocking or banging is still very annoying. There are three main causes of banging:
1. Air bubbles trapped in the water of your central heating system expanding and collapsing can cause clicking noise. The best way to solve this is to use a to release the air from the system. Turn your heating off, wait 10 minutes or so for the bubble to collect at the top of the radiators and then let it out with the key. You may have to do this a few time over the course of a few hours to get all the air out.
P 2. As the pipes in your house heat up they will expand, this expansion causes the pipes to move and warp very slightly. If they are resting against something hard this slight movement will generate popping noises as the pipes expand against the surface of the object. If the object is aPpiecePof furniture then you can either move the furniture slightly or put a foam pad between them. Sometimes the noise comes from pipes that have been run through wooden joists, this can be very annoying to fix and may require you (ideally your plumber) to expand the hole that the pipes are in and then fill the gap with expanding foam. 3.
The most serious and least likely cause is boiler kettling, this happens in hard water areas where limescale builds in in the boiler's heat exchanging and constricts/blocks the flow of water. As the pressure builds up the water turns in to steam, when these steam bubbles collapse and turn back into water you get a rumbling/banging sound - to fix this you need to call out a heating engineer. , Are Your Pipes Banging? When you open the taps in your bathroom, do you hear a banging noise? This is called water hammering and can be caused by a number of things, from pipework not being secured properly under the floorboards to overheating or perhaps a little air in the system.
If you can hear your pipes making a thudding sound, the first thing you need to do is check the thermostat either on your wall or your boiler. To do this properly, turn your boiler off and allow the system to cool down. Once you ve had it switched off for a while, turn your heating back on again and crank up the thermostat like you mean it. You should hear a click when you do this, but if you don t, call a professional engineer to come and diagnose the problem. One of the most common causes of banging pipework is that the pipes under the floor are not secured correctly.
Copper pipes need to be properly secured in order to prevent them rattling too much. A simple solution, that should fix the problem of banging pipes, is to squash some felt around each pipe under your floorboards. Try and concentrate on every place where a pipe touches a joist or another pipe and wrap a little felt around it to create a snug fit. If you ve already had someone look into this for you and the problem still occurs, it may be worth your time investing in some plastic pipework, which is much more flexible and won t make anywhere near as much noise as a copper alternative.
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