Shortly after the timer switches on the boiler I get this noise in the pipes like a train is running through the house, it sounds a bit like possibly steam escaping into the vent/overflow which goes into the CH header tank. I thought it was the cylinder stat so I replaced it, it was pretty old so £7 was no big deal.
However, a couple of days later it did it again The boiler stat looks physically sound but that's no proof that it is working. It looks a pig of a job to replace too. before I call in a qualified tech has anyone any clues as to what this problem might be? I have also noticed that the radiator in the bathroom directly above the boiler appears to be empty and when I try to bleed it no air or water escapes.
Any clues??
However, a couple of days later it did it again The boiler stat looks physically sound but that's no proof that it is working. It looks a pig of a job to replace too. before I call in a qualified tech has anyone any clues as to what this problem might be? I have also noticed that the radiator in the bathroom directly above the boiler appears to be empty and when I try to bleed it no air or water escapes.
Any clues??