In the last 6-8 months when the central heating boiler fires up, in the first few seconds there can be a series of very loud banging sounds from the system, lasting 5 seconds or so. It sounds like someone is hitting the pipes with a hammer. It only occurs when the system is fairly warm (i.e. never on first start up in the morning) and it only occurs about once or twice a week. I flushed and descaled the system then added Fernox at Christmas. The system remained quiet for about three months but has since started the banging again. The boiler is around 15 years old. Now I know that means it may be due for replacement but is it reasonable to think that this noise may be a symptom of impending boiler demise?
Thanks in advance for any help anyone can give. I would be very interested in the technical explanation. So if it is the boiler, what is the cause?
Cheers
Thanks in advance for any help anyone can give. I would be very interested in the technical explanation. So if it is the boiler, what is the cause?
Cheers