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. 4 J9 p! n0 g! I
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Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. % ?! k2 ?9 E) m! i% C( U7 D8 P1 ^: D4 a7 g
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Otherwise, find a professional or change a new set.