F2
Trotec Humidity Sensor Fault (Humidifier)

Humidifier displays F2; unit may run fan but no mist is produced.

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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 RH sensor module, Moisture ingress into sensor, Loose sensor connector, Faulty control board input

How to Fix / Troubleshooting

Safety: Disconnect power before accessing the control panel.

Steps:

  • Locate RH sensor: Typically mounted near the air outlet or intake, often on a small PCB with vent holes.
  • Inspect for condensation: If the sensor is wet, allow it to dry completely. Avoid direct water contact in future cleaning.
  • Check cable and connector: Ensure the sensor harness is intact and firmly plugged into the main PCB.
  • Replace sensor: If F2 persists, replace the humidity sensor module with the correct Trotec part.
  • Control board: Persistent F2 with a new sensor suggests a faulty main PCB.
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Repair Difficulty

Medium 3/5

Required Part

Humidity Sensor Module
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