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- 16 Jan 2013
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Old Potterton condensing boiler. Started with repetitive high-pitched banging noises in central heating pipework drop-down next to bedroom radiator- then said radiator's TRV valve started leaking. Got radiator replaced. Banging noise resolved. However, that same evening of replacing radiator, roughly 2 hours after having central heating on (no problems if just hot water on), loud rumbling noise in, I think pipework just above hot water tank. Sounds like someone moving heavy furniture across a hard floor. Lasts only a couple of seconds each time. No noise on powering on. All quiet for first 2 hours of heating on, then said noise every 15-30 or so minutes. Heating and hot water hot and radiators all bled. Any idea of the cause? Thank you very much.