It is possible that the shut-off valve was blocked by the cumulated white stuff. As a result, water supply can not be stopped even when water level is high. ) B l& I0 ~. R3 I/ A
8 C9 y. Q2 C8 bSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking., ?% D) X8 d5 g( G
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Otherwise, find a professional or change a new set.