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Further to my last posting. I will explain that though I'm not a plumber I am an electrician but have a very good idea of a lot of plumbing techniques. I've since been reading the "FAQ's and Plumbing tips" section on boiler "kettling" and they recommend increasing the flow as one solution...

Thanks for those answers. The system was not powerflushed before fitting the HE, this job was done by a BGas engineer as we have a maintenance contract with them and I just left it to him to fit. The pump is relatively new as that has been replaced within the last 2 or 3 years. It sounded to me...

We have an aging BB 552, it had a new heat exchanger fitted within the last 5 years after it dumped water all over the living room floor. Recently it has started to make noises which sound a bit like a kettle heating up. Is it possible for the exchanger to become blocked and cause hot spots and...