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We have a pre-1900 semi. Solid walls. I'm thinking about having the side wall insulated externally. Won't do front or back - front would mean it would look 'out of place' in the street, also many windows. Back just too complicated - lots of windows, new extension and porch etc. The side wall...

I have this intermittent problem with my central heating boiler (Potterton Suprima 120). It runs fine and heats water and rads but when all controllers turn off and the boiler should shut down showing only a constant red light sometimes (more times than not) the boiler doesn't shut down and sits...