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Old Ferroli combi boiler (with the combi function no longer used, I believe copper HE), directly charging an approx 170l thermal store. Does everything I want from it - or will when I find time to get all the controls as I want them (individually controlled rads, variable flow temp depending on...

Hello and happy new year. I'm not a plumber, I know you need an unvented ticket to do this work, I've done all I can, I'm just looking to clue up so I know the job will be done right. Megaflo 210i Unvented Indirect cylinder installed in new build house 7 years ago. Problems just started in the...