My boiler is about 21/2 years old, and has started a horrible groaning when the thermostat kicks in and it is heating up. I had a guy in from British Gas on my maintenance contract who checked it over, said the boiler itself was in good condition. His diagnoses was
*kettling*. He has added some sort of chemical to the system to stop it but tells me it can take 2 to 6 weeks to cure the problem! Can anyone tell me if this sounds right? Seems a long time?Brian :o(