Hi,
Next challenge with my new house (lucky I enjoy plumbing....)
Ever since wed moved in, there has been a lot of air in the central heating. So far, I have tried the following...
1=2E Bleeding all the rads many times. The only one with any air in is the one in the master bedroom and this needs bleeding every few days. 2=2E The automatic air vent on the feed to the hot tank coil was very corroded so I have replaced it. Curiously it has a little plastic cap on it which I have left open (closing it keeps the air there until you open it) - I assume this is correct? 3=2E I then though the boiler was over heating the water or the boiler stat had gone. When I turn the boiler heat controller (currently set at 2), the boiler seems to fire if I turn it up and go out if I turn it down.Other information I have ascertained is a=2E when the boiler is on, you can hear the air bubbling through it and into the first rad on the run b=2E when I bleed the master bedroon rad, the water is very aerated to the extent that I can't get "normal" water through it c=2E when I removed some water from the system to change the auto air vent, the water was clear which I assumes means there is no inhibitor in it. d=2E we had our first gas bill the other day and it was huge (=A3260 for 7 weeks) this used to be our quarterly bill in the last house!!! We have a 5 bed house but the heating is off in 3 of the bedrooms and the main bathroom as we don't use them. e=2E the boiler was supposedly serviced by the previous owners in November. f=2E I can hear the air through certain rads and the supply to the hot water tank coil.
I thought that no inhibitor could be causing corrosion and hence the air but given I can hear it in the boiler and there is so much of it, I thought this was unlikely to be the root cause. Once I figure out the cause, I will need to put some in anyway but didn't think it worth while at this stage.
So in summary, I am now at a loss. Anyone got any cunning ideas as my wife is convinced the house is haunted?
thanks in advance....
Lee.