The dial on my Greenstar CDi boiler is going in the red section (in to section 3) and I do not know how to bring it back in to the green. Please help
I have a 35CDi GC-Number 47-311-94

N Barham, January 2008

how do i set my clock on a green star combi boiler

trevor, February 2011

Sorry ,misread the question,I thought you meant boiler was under pressurised,not over.If boiler has silver hose attached,detach it and cap it off.If you have a filling key,chances are your expansion vessel is bust,or needs recharging.Failing that your calorifier needs replacing(sometimes called indirect heat exchanger)

GRAEME SMITH, January 2008

Is there a silver hose attached to pipes under boiler,if so there is a tap on there,oen it and pressure gauge will rise.When pressure reads 1.2 bar approx close tap,then bleed radiators starting at farthest and lowest from the boiler until water appears.Check gauge again,if pressure has dropped,repeat filling procedure,when all rads are full you're aiming for 1.25 bar approx on your gauge.Hope this helps

GRAEME SMITH, January 2008

You need to remove some water from the system - the easiest way is to undo a bleed valve from the top of a radiator and let the water escape that way. It takes a while but it is the cleanest way.

John, January 2008