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. , T* O/ F2 W6 }: r( `
; r/ K% I( T) i: d q9 ?Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking.7 t8 J* f4 y% E* Q: p% S5 W, B
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Otherwise, find a professional or change a new set.