check pressure relief valve outside/when heating on does pressure guage go above 3bar.if so expansion vessell req recharging/or renewing all get gas.safe engineer 2 check inside heat exchanger as insulation pads will show deteiriation/or discolouring inside good/luck m8
patrick cronin
January 2010
I can answer this question...
My vokera Compact He keeps losing pressure and shuts down?