My heating doesn't come on some evenings and when I check the boiler I see it has a pressure of maybe 0.5 or less. I therefore increase pressure by opening the left-hand one of two taps below it and increase pressure to about 1 or 1.2. This seems to work. The next day it's about 0.5 again, however.
I take it the two taps I'm talking about are the boiler "loop". For as long as I remember the tap on the right has always been open and the left one (which I turn to add pressure) closed. I have just left it like that. Should they both normally be closed, then opened to add pressure, then closed. If the right-hand one is always open, is this what causes the pressure loss?
Another odd thing that happened one with the boiler recently was that pressure went up very high by itself (to about 2.8 or 3) and then water emitted through the overflow pipe. After that it still operated OK however, (or at least as above).
I still have heat and hot-water (with some re-pressurising, as above), so don't really want a call-out for no reason, unless it sounds like something will soon go badly wrong (it has been like this for weeks however). I'll wait till annual service.
I would be extremely doubtful that pressure-drop was due to a fault in pipe-work, as this was largely re-routed (avoiding under-floors) only a few years ago, after previous pressure problems caused by that. Any leakage would show somewhere.
Boiler is British Gas 330+
I take it the two taps I'm talking about are the boiler "loop". For as long as I remember the tap on the right has always been open and the left one (which I turn to add pressure) closed. I have just left it like that. Should they both normally be closed, then opened to add pressure, then closed. If the right-hand one is always open, is this what causes the pressure loss?
Another odd thing that happened one with the boiler recently was that pressure went up very high by itself (to about 2.8 or 3) and then water emitted through the overflow pipe. After that it still operated OK however, (or at least as above).
I still have heat and hot-water (with some re-pressurising, as above), so don't really want a call-out for no reason, unless it sounds like something will soon go badly wrong (it has been like this for weeks however). I'll wait till annual service.
I would be extremely doubtful that pressure-drop was due to a fault in pipe-work, as this was largely re-routed (avoiding under-floors) only a few years ago, after previous pressure problems caused by that. Any leakage would show somewhere.
Boiler is British Gas 330+
