Miele Blocked Defrost Drain

Water or ice forming on the bottom of the freezer compartment

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Possible Causes

Ice blockage in defrost drain hole, Food debris clogging drain tube, Drain heater (if fitted) not working, Cabinet not level causing poor drainage

How to Fix / Troubleshooting

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

Steps:

  • 1. Defrost ice: Remove drawers and allow the freezer to defrost until ice at the bottom and around the drain area melts. Use towels to absorb water.
  • 2. Locate drain hole: Usually at the lowest point under the evaporator cover. Remove any visible debris.
  • 3. Clear drain tube: Use a flexible plastic tube or pipe cleaner to gently clear the drain. You can flush with warm (not boiling) water using a syringe or turkey baster.
  • 4. Check leveling: Ensure the freezer is slightly tilted back so water flows to the drain.
  • 5. Drain heater (if present): On some models, a small heater keeps the drain clear. If ice repeatedly blocks the drain, the heater may be faulty and require replacement.
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Repair Difficulty

Easy 2/5

Required Part

Defrost Drain Heater
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