Got a new boiler in Feb. Was told a power flush was not needed and they added cleaner and next day came for about 30min in attic with hose, said it was clean. Now I've put heating on again, rads are cold at bottom, so I presume full of slum. Rang company who fitted boiler, told nothing to do with them what plumber told me, they don't power flush before install. Anyway, now I presume I need power flush. Can anyone recommend me a company in Lincolnshire area.