P1
AEG Water Tank Full Protection Activated

Dehumidifier shows P1 and stops, water tank may be full

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Possible Causes

Full water tank, Misreading from water level sensor, Blocked drain path causing tank to fill unexpectedly, Faulty float switch

How to Fix / Troubleshooting

Safety: Unplug the unit before handling water.

  • Empty tank: Remove and empty the water tank. Clean it to remove any slime or debris.
  • Check float and switch: Verify that the float moves freely and that the float switch operates correctly (see E7 entry).
  • Inspect continuous drain: If using a hose, ensure the drain hose is not kinked or blocked and that it slopes downward continuously to the drain.
  • Reset: Reinstall the tank securely and power the unit. If P1 persists with an empty tank and working float, replace the water level float switch.
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Repair Difficulty

Easy 2/5

Required Part

Water Level Float Switch
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