filling itself

  1. M

    Toilet cistern filling as and when, what needs replacing?

    Hi all My cistern started making an droning noise a month or so back when filling, now, it's louder when refilling after flushing and it's regularly refilling by itself... very early in the morning. Is it the 'float' device that's faulty or the flush valve? Or would you normally replace both? TIA
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