i work for warrington and wigan councils as a spark . im in need of a new boiler so have been doing lots of homework as to which boiler to get . luckily i have about 20 plumbers nd heating engineers to pick the brains of . we fit bosch and vaillant which are big money ( to much for my budgt to be honest) i seen the biasi riva 24k on screw fix and in b and q . i asked several of our engineers and they said exactly what has happened to you . they said by all means they d fit one , but they d be back in 18 months 2 years to put a proper one in . you ve confirmed for me what they said . hope it gets sorted for you mate and you dont get any more problems .