hi all, was just wondering whether any of you could advise . I have a biasi riva m96.24sm/c2 combi boiler. The boiler lock out light comes whether I am using hot water or central heating. It locks out at random/irregular times so it's hard to pinpoint the problem. Sometime it can work fine for hours and then other times it just cuts out after 30 mins or so. I have looked in the manual at the error light codes but they don't seem to match the lighting the boiler is currently displaying. The right hand light is permanently on green but the centre light flashes red alternately with the left hand light which flashes green. I've looked over the boiler manuals light/problem codes several times but it doesn't match what I am getting. Any possibilities as to what the problem could be would be greatly received. Thanks Steven.