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. 2 d0 w2 d6 _3 K3 K A& v0 K
5 o t1 m6 _! @5 M- `0 iSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking., H* k) v @% {( E! r+ c: f3 s0 k. i
: b3 B5 d2 @9 w; y* ^ 9 ?; s4 E# q; l7 t. cOtherwise, find a professional or change a new set.