LG Er dH — Defrost Heater Error
What This Code Means
The defrost heater failed to raise the evaporator temperature to the expected level during the defrost cycle. This causes ice to accumulate on the evaporator coils, progressively reducing airflow and cooling.
Common Causes
- Open or shorted defrost heater element
- Failed defrost thermostat (thermal fuse blown)
- Defrost timer or control board not initiating defrost cycle
- Wiring harness damage near the heater assembly
DIY Steps to Try First
- Power cycle the fridge (unplug 5 minutes) to clear temporary faults.
- Check if both compartments are cooling — if the freezer is fine but the fridge is warm, excessive ice buildup is likely blocking airflow.
- Do NOT attempt to manually defrost with a heat gun or hairdryer near the evaporator — risk of damaging the sealed system.