F3 code, unit cycles rapidly and does not control humidity correctly

Safety: Disconnect power before accessing the control panel or sensor.

Steps:

• 1. Compare readings: Place a reliable hygrometer near the dehumidifier and compare its reading to the unit's display. If the difference is large (>10% RH), the sensor may be out of calibration.
• 2. Inspect sensor: Locate the humidity sensor module and check for signs of water damage or corrosion. Ensure it is not directly in the moist air stream from the outlet.
• 3. Replace sensor: Install a new Ebac humidity sensor module compatible with your model. Mount it in the same location and orientation as the original.
• 4. Reset / calibration: Some Ebac models allow a service reset or calibration via button sequence. Refer to the service manual; perform the reset if available.
• 5. PCB / firmware: If a new sensor does not resolve F3, the main PCB or firmware may be faulty and require replacement by an authorized service center.

Note: Avoid spraying cleaners or fragrances near the humidity sensor; chemicals can permanently alter its response.