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I just noticed that my boiler was running at a high pressure for a long time, (a number of months) as the filling loop stop cock was slightly open, pumping water into the boiler. I found out as i saw water dripping outside in the emergency release pipe and when i checked the pressure gauge...

I have a worcester 24i junior boiler and have recently noticed that when the heating is turned on, the boiler lights and then about 15 seconds later the boiler seems to pop and bang for about 1 minute, After this the heating runs normally and no further banging. The pump is rotating, i...