ER HS
LG
Humidity Sensor Error (Affects Ice Room Frost and Airflow)
Refrigerator displays HS; ice production is poor and humidity control seems off.
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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 failure, Sensor harness loose, Moisture intrusion in sensor connector, Main PCB sensor circuit failure
How to Fix / Troubleshooting
Safety: Disconnect power before accessing sensor wiring.
- Locate humidity sensor: On many LG models, the humidity sensor is located in the fresh food compartment or near the ice room duct.
- Inspect and dry: Check the sensor and connector for condensation or corrosion. Dry thoroughly and clean contacts if needed.
- Reconnect harness: Unplug and firmly reconnect the sensor harness to ensure a solid electrical connection.
- Replace sensor: If HS returns after reset, replace the humidity sensor module with an OEM LG part.
- Control board check: If a new sensor does not resolve the error, the main PCB may be faulty and should be evaluated by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor
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