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. + h) J9 W( E+ N5 S- l/ d5 O3 @- m: @ \0 w. T D X# C) [
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. 9 k# a% ]' N$ h5 e7 g- k9 B/ V3 b# ^7 L1 A; O2 x% k
8 h: ]! l8 L7 m, X) v8 R5 ?" j( COtherwise, find a professional or change a new set.