I come to turn my heating on but it wasn’t working but I still had hot water I checked my boiler in the loft and it was leaking from the right hand side , I took the boiler cover of and after looking on YouTube saw how to replace this part so I did but my heating was still not working but the leak had stopped . I searched you tube to see what could still be the problem, I was getting that fed up I even booked a plumber who let me down so off on my journey I started again only by luck to see it could be the diverta valve that could be the fault so I took my self to the plumbers merchant a purchased one . Low and behold this did the trick it only took me 5 minutes to fit so now I have hot water & central heating both these jobs were made easy due to you tube . I thought il have a go at that and I’m glad I did has saved me at least £200 . Both these jobs we easy so 👍go girl power