But with poor combustion (incorrect co2 ratio) or the heat exchanger needing cleaning it can make a bit of a strange noise. Common fault 4: Strange banging noises. The banging noise is coming from the boiler (Bosch 28Si) and this then causes the rattle back down the DHW cold inlet pipe. How to get rid of banging noises from the boiler Woke up a 3 am this morning with boiler on, and making loud banging noise and shuddering. A rumbling noise coming from your boiler is a sign that it is kettling. We get hot water, (boiler shudders twice and then continues working). At this stage the boiler usually runs a bit quieter. The Cause: If you hear a strange banging noise when your boiler fires up, this is usually a problem with the gas valve communicating with the fan speed. Jump over to our article that covers noisy boilers here. Kettling is a serious issue that is caused by mineral deposits building up on the inside of the boiler’s heat exchanger. A heat exchanger that is kettling. Most other types of noise are evident at all times of operation. Boiler making banging noises ‘My boiler is making a banging / clunking noise?’ You may have noticed this fault as you turn on your heating ready for the colder months. However today within a span of 4 hours this happened twice. Your boiler may still be working while making the noise, which may tempt you to not take action. #6 – Boiler Is Making Banging Noises. The two most common causes of the problem are: An airlock in the central heating pump. ... Combi boiler making screeching noise … This can often be caused by the pressure being too high or old boiler components wearing down. The Fix: Call a Worcester Bosch service engineer or an accredited engineer, who will be able to take a look at it for you. Boiler keeps making banging noises (A41) Hearing banging sounds from your boiler is an indication of kettling, which is generally caused by limescale buildup, a faulty thermostat or inadequate water pressure. If your Worcester boiler fault relates to loud banging noises, there’s a fix. It doesn't do it every single time, I'd say about 80% of the time. The Fix. Having looked at the boiler more closely I can see that the DHW cold inlet pipe simply runs in to the water flow switch, on to the heat exchanger and then out to the DHW flow. If your boiler is making loud banging noises, it may be the result of a faulty thermostat or a build-up of debris on the boiler’s heat exchanger. We have Worcester Greenstar 30CDI Combi boiler and it has started making very loud vibrating noises. I turn everything off, and checked 30 mins later , initially with hot water and then with c.h system. Noise is really loud and vibrating. Loud banging noises. Hi - we have a Worcester Bosch combi gas boiler (24i RSF model) and just lately we have heard a loud banging / clicking noise when running the hot water - after a couple of days of it doing this, it then started to do it when the central heating starts up. There are many different noises that your central heating system can make, and while some of them can seem worrying at first, most will be easily fixed. Yes This started 3-4 weeks ago and earlier it was once a week. This can cause ongoing problems with the central heating system. These mineral deposits are caused by hard water (water with a high mineral content) running through the boiler … Yes: Dripping: A dripping noise is a clear indication that there’s a leak somewhere within the system. If you are at all unsure about any noise your heating system is making, the safest thing to do is call our friendly boiler repairs team on 0800 032 6478 or … The radiators were not warm. With modern boilers as the temperature increases the boiler will modulate to a lower flame. Boiler worked all night and throughout saturday. Banging: Your boiler making banging noises can also be caused by debris building up on the heat exchanger, requiring a powerflush to resolve. 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