F1
Meaco Humidity Sensor Fault (Humidifier)

Meaco humidifier shows F1 and will not run the ultrasonic mist

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed humidity sensor, Sensor cable damage, Moisture ingress on sensor PCB, Faulty main control PCB

How to Fix / Troubleshooting

Safety: Unplug the humidifier before opening the housing.

Steps:

  • Reset: Disconnect power for 10 minutes, then reconnect. If F1 returns, continue.
  • Locate humidity sensor: Typically mounted near the air outlet or on a small PCB inside the housing.
  • Inspect and clean: Check for condensation or mineral deposits on the sensor. Gently dry and clean with dry air; do not use water.
  • Check wiring: Ensure the sensor harness is intact and firmly connected to the main PCB.
  • Replace sensor: If the sensor appears damaged or F1 persists, install a new Meaco humidifier humidity sensor module.
  • PCB replacement: If a new sensor does not resolve F1, the main control PCB may be faulty and should be replaced by a technician.
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Repair Difficulty

Medium 3/5

Required Part

Humidity Sensor Module
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