Hi all! First time posting - really hoping someone can help me. When we turn on our central heating there is an loud banging noise from near the radiator in the main bedroom. It's not just when the heating is turned on or off/cooling down, it's ongoing. It's driving me mental! I've tried everything - we have an old boiler and initially looked at that as the issue, had someone come and service it and despite it's age/being a tad loud it's fine and not the cause of the noise. It's been given the all clear. It's not trapped air as when I bleed the radiator very little comes out before the water starts to flow out. The other radiators in the house are dead silent... it's just the one in the bedroom, but you can even hear the banging noise if you're in the room under the bedroom! I then thought it was loose pipes knocking against the joints as they expand/contract - so plagued my OH to pull up the carpet, move the furnishings and lag/wrap the pipes where they meet the joints to tighten it all up. He's just done that with his Dad...and low and behold....the banging continues! It's the only loud one in the house, it's an old radiator, quite old. It was in the house when we bought it - will replacing it make any difference? Will that solve the problem? The only other thing I can think of is power flushing the central heating system...but I'd rather try everything else before having to resort to that. ANY HELP is much appreciated. Please save my sanity before this knocking drives me over the edge! Ta. K.