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. 1 I- K) V" _+ d @
3 d! F' J r# D& l7 ]
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking., M- w" {$ Q" j3 t# f4 f& H0 y
- x3 D' u5 N6 f) J0 `. @5 a9 ?+ e8 b1 o$ G. F/ A8 g6 c- W8 E4 i
Otherwise, find a professional or change a new set.