I have a ferroli optima 901 boiler which i am experiencing problems with. I have recently changed a radiator and after fitting i have repressurised the system to 1 bar. I then turned on the central heating and all seemed ok, until i found water coming out of the boiler overflow. The pressure in the system continues to build up.

Dave B, March 2009

check your filling loop, sounds like its passing water

STE, March 2009