Does anyone know where I can get a user guide on how to change a diverter valve for a turbomax plus 828e boiler? Or can anyone give me some instructions? Please don't respond with "if you don't know what you are doing, get a heating engineer to fit it" . I'm quite handy myself with house DIY, car maintenance and anything with my hands. I've fitted rads, changed taps, blah blah but never done anything with a boiler before. Plus I don't have the money to pay a heating engineer or risk getting ripped off. Thanks!!