Question about Air-O-Swiss U7142 Humidifier
The water sensor is a float in the mister area of the base. The float is off in one corner with a little plastic barrier around it and translucent cap over it. Make sure the float can more freely. If the float can move up and down but the light stays on, the reed switch (a switch controlled by a magnet built into the float) inside the unit might have been knocked loose, damaged or disconnected. The switch is actually inside the post that the float slides on, but it can only be accessed from the underside - inside the unit.
Posted on Jul 16, 2010
For my 7142, it seemed that the water level switch was stuck open over most of its travel. I turned the unit upside down and shook it vigorously a few times. This appears to have reset the reed switch that iksbob mentions in the first answer. It works again - for now. Give it a try.
Posted on Dec 31, 2014
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Q: Unit is running intermittently.
A: How long has it been since the contents of the cartridge were replaced? If 2-3 months have passed, it is time to replace the contents of the cartridge. However the demineralization cartridge and or the granules must be exchanged at the latest after 6 months or the unit ceases operating at its full performance. If the contents of the cartridge were just replaced there are probably too many granules in the cartridge. Remove 2 tablespoons of granules from the cartridge.
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