LG Refrigerator Error Code Er tt — Water Tank Sensor Error
What this means
The Er tt error code indicates a problem with the water tank detection system. This applies to LG refrigerator models with an internal water tank (instead of a direct water line connection). The tank may be missing, not properly seated, or the temperature/position sensor on the tank has failed.
Alternate codes: tt
Step-by-step fix
2 stepsCheck the water tank
Open the refrigerator and locate the water tank. Remove it and reinsert it firmly, making sure it clicks into the correct position.
Inspect the tank and contacts
Check the water tank for cracks and ensure the electrical contacts on the tank and the refrigerator housing are clean and undamaged.
When to call a professional
If the tank is properly seated and the error persists, the tank sensor may need professional replacement.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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