F1
Sharp
Humidity Sensor Calibration / Range Error
Dehumidifier shows F1 and will not respond to humidity settings properly.
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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
Humidity sensor drifted out of range, contamination on sensor element, incorrect sensor installed, failed humidity sensor circuit on PCB
How to Fix / Troubleshooting
Safety: Unplug before opening the control panel.
Steps:
- Compare humidity: Use a separate hygrometer in the room. If the Sharp unit's reading is far off or F1 is displayed, suspect the sensor.
- Access sensor: Remove the control panel or intake grille to locate the humidity sensor module.
- Clean gently: Blow off dust with dry compressed air. Do not touch the sensing element with fingers or liquids.
- Check wiring: Ensure the sensor harness is fully seated and not damaged.
- Replace sensor: If F1 persists, install a new Sharp-compatible humidity sensor module.
- PCB replacement: If a new sensor does not resolve the issue, the main or display PCB may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor Module
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