Lanbo Frost Buildup / Defrost System Failure

Excessive frost or ice buildup on the back wall or around the evaporator cover.

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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

Defective defrost heater, Failed defrost sensor or thermostat, Blocked drain causing ice accumulation, Door gasket leaks allowing moist air in

How to Fix / Troubleshooting

Unplug the unit and remove all bottles before defrosting.

  • 1. Manual defrost:
    • Open the door and allow all ice to melt naturally.
    • Use towels to absorb water; do not chip ice with sharp tools.
  • 2. Inspect door gasket:
    • Check for gaps or tears in the door gasket and replace if necessary.
  • 3. Clear drain:
    • Locate the defrost drain hole below the evaporator.
    • Use a small brush or pipe cleaner to clear any blockage.
  • 4. Test defrost heater and sensor:
    • Access the evaporator area and measure resistance of the defrost heater and defrost sensor.
    • Replace any open or shorted components.
  • 5. If frost returns quickly:
    • The main control board may not be initiating defrost cycles properly and may need replacement.
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Repair Difficulty

Hard 4/5

Required Part

Defrost Heater
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