- Coffee machine displays the message "AIR BUBBLE ALARM"
- Built-in coffee machine with a display and rotary knob
- Press OK to deliver water from the spout until it flows out normally. Delivery stops automatically.
- If the problem persists, make sure the water tank is fully inserted.
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For AEG coffee machine initial setup, troubleshooting guide and cleaning recommendations see our coffee machine Q&A
- The water circuit is empty
- Water tank not fully inserted