Boneco False Low-Water Detection

Humidifier shuts off unexpectedly even though the tank is full

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Possible Causes

Sticking float in base, Misaligned tank not pressing valve correctly, Faulty water level sensor or reed switch, Debris preventing water from entering base

How to Fix / Troubleshooting

Safety: Unplug before handling water components.

Steps:

  • Reseat the tank: Remove and reinstall the tank carefully, ensuring it is fully seated and level.
  • Check for air lock: After filling, gently shake the tank to release trapped air around the valve. Ensure water flows into the base (look for bubbles).
  • Clean float and chamber: Remove the tank and inspect the float in the base. Clean any scale or slime that may cause sticking.
  • Test float switch: Manually lift the float and listen for a click from the reed switch. If there is no click or the unit does not respond, the switch may be faulty.
  • Replace faulty parts: Install a new float and reed switch assembly if the sensor is defective.
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Repair Difficulty

Easy 2/5

Required Part

Water Level Float Switch Assembly
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