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. " f) G J; W0 B* k
j" H& J' B. ^, N0 U2 QSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking.( z3 M) M$ [' ~; h6 J- h. H, H8 J5 J0 d
; a/ S- b* ~# i. Q5 E! J
. L* |8 F2 k' m1 B% ]* [
Otherwise, find a professional or change a new set.