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. * j0 u1 s6 Z. y* t6 i( G& j! F6 J, e- |# Q8 A3 W
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. & Z* D7 H2 s& V5 {8 ^9 a* t5 ]' @! i* [& f- ~$ \( v& B3 `$ [3 D$ O
1 y0 `2 T$ W' kOtherwise, find a professional or change a new set.