E3
Gree
Humidity Sensor (RH Sensor) Failure or Out of Range
Dehumidifier shows E3 and compressor does not start or stops quickly.
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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 relative humidity sensor module, Humidity sensor cable damaged or unplugged, Corroded connector at control PCB, Main PCB analog-to-digital circuit failure
How to Fix / Troubleshooting
Safety: Unplug the unit before servicing. Avoid touching the compressor terminals.
Steps:
- Soft reset: Disconnect power for 5–10 minutes, then power back on. If E3 persists, continue.
- Locate humidity sensor: The humidity sensor is often mounted behind the front grille near the air inlet or integrated into the control panel area with a small vented housing.
- Visual inspection: Check for dust buildup, moisture, or corrosion on the sensor. Gently clean with dry compressed air; do not use liquid cleaners.
- Check wiring: Follow the sensor harness to the main PCB. Ensure the connector is fully seated and wires are not broken or pinched.
- Replace sensor: If E3 remains and wiring is intact, replace the humidity sensor module with a Gree-compatible part. Mount it in the same location and orientation to ensure accurate readings.
- Control board check: If a new sensor does not resolve E3, the main control board may be faulty and should be tested or replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor Module
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