AEG Blocked Defrost Drain

Thick ice sheet forming on bottom of freezer compartment

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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

Frozen or clogged drain hole under evaporator, Debris blocking drain tube, Drain heater (if fitted) not working, Cabinet insulation moisture causing refreezing

How to Fix / Troubleshooting

Safety: Unplug the freezer before defrosting or working near the evaporator.

Steps:

  • 1. Defrost ice: Remove drawers and rear internal panel. Melt ice around the drain trough using warm water or a hair dryer on low. Do not use sharp tools.
  • 2. Clear drain hole: Locate the drain hole at the bottom of the evaporator tray. Use a soft pipe cleaner or flexible plastic rod to gently clear the blockage.
  • 3. Flush drain: Pour a small amount of warm water down the drain and confirm it flows freely to the drain pan above the compressor.
  • 4. Check drain heater (if present): Some AEG models have a small heater near the drain. Test for continuity and replace if open.
  • 5. Reassemble: Refit panels and restart the freezer. Monitor for recurrence.
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Repair Difficulty

Medium 3/5

Required Part

Defrost Drain Tube
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