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lg | refrigerator – Defrost Heater Fault / Ice buildup may block water or fill tube
Error Codes (undefined): Troubleshooting, Fixes & Prevention Tips explained below.

What Does Defrost Heater Fault / Ice Buildup Error Mean?❓

This error indicates that the defrost heater in your LG refrigerator is not functioning properly, causing ice buildup on the evaporator coil or water fill tub. Ice buildup can block water flow, affecting the ice maker or water dispenser performance and causing cooling inefficiencies.

refrigerator - Possible Causes of Defrost Heater Fault and Ice Buildup

  • Defrost heater is faulty or burned out
  • Ice buildup blocking water fill tub or drain
  • Disconnected or damaged heater wiring
  • Sensor malfunction causing heater to fail
  • Control board failing to trigger defrost cycle

refrigerator - How to Fix Defrost Heater Fault and Ice Buildup Issue❓

  • Unplug and Reset the Refrigerator

    1. Turn off power and unplug for 10 minutes to reset the system.

  • Inspect the Defrost Heater

    1. Locate the defrost heater behind the freezer panel.
    2. Check for visible damage or disconnected wires.

  • Remove Ice Buildup

    1. Carefully defrost the evaporator coil and water fill tub manually if possible.
    2. Avoid using sharp tools that can damage components.

  • Replace Defrost Heater if Faulty

    1. Purchase the correct replacement part for your model.
    2. Install it following manufacturer instructions or call a technician.

  • Call Professional Help

    1. If the error persists or you are unsure, contact LG support or a certified technician.

refrigerator - Tips to Prevent Defrost Heater Fault and Ice Buildup

  • Keep freezer door closed to prevent excess moisture
  • Regularly defrost manually if frost buildup occurs
  • Clean drain hole and water fill tub to prevent blockage
  • Schedule annual maintenance for defrost system
  • Avoid frequent power outages or surges

Frequently Asked Questions About Defrost Heater Fault❓

Question: Can I continue using the refrigerator with this error?
Answer: It is not recommended because ice buildup can cause cooling problems and water flow blockage.
Question: How much does it cost to replace the defrost heater?
Answer: Replacement parts generally cost between ₹600 and ₹1500, excluding labor.
Question: Is manual defrosting a good solution?
Answer: Yes, but only as a temporary fix until the sensor or heater is repaired.
Question: Can I replace the defrost heater myself?
Answer: Only if you are comfortable with electrical repairs. Otherwise, seek professional help.

When to Contact a Technician

If you experience any of the following issues even after completing the recommended troubleshooting steps, please contact an authorized service technician or our support team for further assistance.

  • The same error appears repeatedly after restarting or resetting the unit.
  • Multiple error codes appear simultaneously.
  • The device makes unusual noises, vibrations, or emits a burning smell.
  • The product fails to start, operate, or complete its function despite troubleshooting.
  • There are signs of electrical issues, physical damage, or leakage.
  • An unknown or unlisted error code appears on the display.

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