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Hi wonder if you can help please, my combi boiler ariston aco27 works fine heating and hot water, but the pressure gauge is at zero i tried putting more water in via the loop but the needle dont move, is it something i can check or do i have to call out an engeneer? any help...

Hi Guy's Hope someone can help My boiler fires up and heats the water, only when water in the hot water tank goes below a certain temperature,then if i pull the lever on the diverter valve to manual override my radiators get hot.but as soon as the water is hot enough (i assume it reach's it's...