My boiler or my system is making
a noise quite frequenty it is like a rumbling
that happens more some days than others
I have noticed that the pressure reading is
quite high just slightly over 3 the instalation fitter
sais it should be 1to1/12 could this be the problem
if so how can I turn it down

David Thomas, October 2007

I don't have this boiler but on my combi the pressure ia around 1.5 bar when cold and higher when hot. Maybe the fitter meant it should be 1.5 when cold. Is there a red zone on the dial?

Rumbling could be several things - pump bearing?

You could phone the manufacturer and ask for tech support to check pressure settings are within specs. The pressure is initially set through a filling loop - a flexi pipe with a tap that fills the system (assuming it is a combi boiler).

Ant, November 2007