Display shows E04; machine may stop mid-brew and beep.

Safety first: Unplug the unit before removing trays.

• Empty drip tray: Carefully slide out the drip tray and discard any collected water. Rinse and dry the tray thoroughly.
• Clean float or sensor: If the tray has a float, ensure it moves freely and is not stuck with coffee residue. Clean with warm soapy water. For optical sensors, wipe the sensor window with a soft cloth.
• Reinstall tray: Push the tray fully back into place until it is flush with the front panel.
• Test: Plug in and restart the machine. If E04 persists with an empty, clean tray, the tray sensor or wiring may be defective and require service.