Miele Water Tank Detection Issue (No Error Code)

Display repeatedly shows 'Fill water tank' even when the tank is full.

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Possible Causes

Dirty or stuck float in the water tank, misaligned tank, weak float magnet, partially failed tank sensor.

How to Fix / Troubleshooting

User-level steps:

  • Remove the water tank and empty it completely.
  • Rinse the tank and float area, ensuring the float moves freely up and down.
  • Clean the tank seating area on the machine.
  • Refill and firmly reinsert the tank.

Technical checks:

  • If the issue persists, test the tank sensor (reed or Hall) and replace it if it is intermittent.
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Repair Difficulty

Easy 2/5

Required Part

Water Tank / Water Tank Sensor
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