HI boys i have just signed up to this site and i have a question for you, I had a baxi 105e boiler installed in my airing cupboard three years ago and i get this bang bang bang banging in the boiler when the heating is on -every 2 or 3 minutes. I have bleed the rads many times, i have even kept the valves open slightly to keep the pressure up while bleeding the rads , but the noisy hammering still comes back i find it hard to get any sleep through the winter and so dose the kids when the heating is on , i really hope you can help