Parmen

Fix Dreame L20 'Water Tank Empty' Error

Solve the persistent water tank loop on your Dreame L20 Ultra with these steps.

2 / 6

Understand the Sensor Logic

The error occurs because the internal pump detects no backpressure, signaling a potential airlock issue.

3 / 6

Dealing with Airlocks

Air bubbles trapped in the tank coupling often trigger false empty tank alerts during operation.

4 / 6

Try the Purge Method

Remove and replace the tank while powered on to force a system recalibration and reset.

5 / 6

Check the Magnetic Sensors

Ensure the internal tank magnet is properly aligned with the base unit's reed sensor switch.