The most common cause of boiler noise, also known as ‘kettling’, is limescale deposition within the heat exchanger of the boiler. As deposits are good insulators, it is the partial insulation of the heat exchanger surface that can cause uneven heating and the rattling noise you hear.Click to see full answer. Beside this, is kettling dangerous?Why Boiler Kettling is Dangerous. Is your boiler making a deep rumbling sound, as though it were a giant tea kettle about to boil over? That sound is, appropriately, referred to as kettling, and it’s a symptom of a pretty serious problem with the system. If not treated, the entire boiler could break down.Additionally, why does my boiler make a kettling noise? The most common cause of boiler kettling however tends to be an accumulation of lime scale on the boiler’s heat exchanger. As a result of this, water can become trapped in the boiler’s heat exchanger which then makes it overheat, generate steam and expand. The whistling noise is a consequence of this process. Similarly, what does a kettling boiler sound like? The similar sound to a kettle boiling coming from your boiler could be down to something called kettling. A boiler operates by heating hot water via a heat exchanger. When the water flow is restricted as it is trapped in the heat exchanger it becomes too hot and starts to steam, boil and therefore expand.Can a kettling boiler explode?Don’t panic – your boiler may sound like it’s about to explode at any second, but this is incredibly unlikely, as loud as it may be whistling or banging. Most boilers have safety mechanisms that will cause it to shut itself down prior to it becoming a danger.
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