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. ! a& W p7 v6 c1 n9 k4 P3 \& T# {$ C
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking.4 n; U* @0 s+ S- |* I/ |3 i
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- c3 T: X+ z+ nOtherwise, find a professional or change a new set.