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Error code reference

LG Refrigerator Error Code Er dH

Poor Defrosting

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What the Er dH error code actually means

Your LG refrigerator's automatic defrost system is not working correctly, which means frost is building up on the cooling coils inside the freezer. Over time, this frost buildup will block airflow and cause the refrigerator to stop cooling properly. A heating element, a safety fuse, or a loose wire connection inside the freezer section is likely the cause.

Diagnostic procedure

The full Er dH procedure

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1
First diagnostic step
Check the door gasket, then check Fuse-M, defrost heater, and defrost sensor resistance.
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Most common causes of Er dH

Ranked by how often they cause this code
  1. 1Failed defrost heater
  2. 2Blown thermal fuse
  3. 3Disconnected or damaged wiring connector
  4. 4Defrost sensor failure

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Questions people ask about Er dH

What does Er dH mean on a LG refrigerator?
Er dH indicates that the defrost cycle failed to complete successfully. The refrigerator's defrost sensor did not reach 46°F (8°C) within one hour after the defrost cycle started. This points to a problem with the defrost heater, the thermal fuse, or the wiring connector in that circuit. The code appears at minimum one hour after the failure actually occurs.
Will resetting my LG refrigerator clear the Er dH code?
A power reset may temporarily clear the Er dH code from the display, but the underlying defrost system fault will remain. The code will return once the next defrost cycle runs and again fails to reach the required temperature threshold. A reset is useful for confirming the fault is consistent, but it is not a repair.
How much does it cost to repair an Er dH error on an LG refrigerator?
Repair costs vary depending on which component has failed. A thermal fuse is typically the least expensive part, with DIY repair costs generally ranging from $10 to $30 for the part alone. A defrost heater replacement part usually runs $30 to $80 depending on the model. If you hire a technician, total labor and parts costs commonly fall in the range of $100 to $300, depending on your location and the specific components involved.
Can I fix Er dH on my LG refrigerator myself?
A knowledgeable DIYer can diagnose and often repair this error. The first steps are unplugging the refrigerator, accessing the evaporator panel in the freezer section, and using a multimeter to test the defrost heater and thermal fuse for continuity. If a connector is simply loose, reconnecting it may resolve the issue without any parts. Replacing the heater or thermal fuse requires basic wiring work and sourcing the correct replacement component for your specific LG model.
Is it safe to keep using my refrigerator when Er dH is showing?
Continued use is not recommended without addressing the fault. With the defrost system not working, frost will progressively build up on the evaporator coil and block airflow throughout the refrigerator and freezer compartments. This will cause the unit to lose cooling capacity, potentially allowing food to reach unsafe temperatures. Addressing the repair promptly protects both your food and the refrigerator's compressor from overworking.

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