Hi your radiators or boilers could be making a lot of noise due to variety of reasons please have a look here why: Boilers make noise because a badly installed high power boiler in a small heating system can lead to overheating. This is because the heat exchange is unable to remove all the excessive heat. This can cause boiling and a loud noise.https://hasslefreeboilers.com/boiler-makes-noise/
It might help if you bleed your radiators. To bleed a radiator, you will have to release basically pockets of air trapped in the central heating system that keeps it from functioning properly.
The only way of getting the heating of the system back to optimum levels is by letting out air that has become trapped inside. This process is known as “bleeding” and it can either be done by yourself. Otherwise please call a professional to get rid of the cold spots and improve the efficiency of your radiator. Since bleeding radiators is relatively easy, let’s take a look of how you can accomplish this by the DIY method. https://hasslefreeboilers.com/how-to-bleed-a-radiator/
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