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WORCESTER 24CDI COMBI BOILER?

The pressure on the boiler reads zero, before the heating is on then rises up to 1. Is this OK or should there be a reading before I switch it on, and if so is this dangerous.?Do I need to get it checked by a qualified engineer????
Christine, January 2009
it does show a problem with your expantion vessel may need re-charging

tim, January 2009
the pressure should be at 1 bar when boiler is cold and will rise and fall between 1 and 2 bar as the heating is on

deggsy, January 2009
link Click here to see other fixes for Worcester.