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...
Ok, ive foudnd the AAV. Its behind the pump and the pump needs to be removed to get to it. It is open, as ive heard air coming out of it when i re filled the system.
Im still getting really loud banging noises when the heating is turned on. It seems like its coming from the heating...
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...