When the CH is on the boiler pressure gradually rises to the red after about 5 or 10 mins. There is no problem with the hot water from the taps, but I guess that's as they're not on for as long.
The expansion bladder is at the correct presure.
Any ideas why the pressure is building?
Ta.
The expansion bladder is at the correct presure.
Any ideas why the pressure is building?
Ta.