Philips coffee maker constantly asks to 'Empty drip tray' even when the tray is empty.

Safety: Unplug before inspecting the tray sensor.

• Clean drip tray: Remove the tray, separate all parts, and wash thoroughly. Ensure the float moves freely.
• Check magnet: Some trays use a magnet in the float. If the float is cracked or the magnet missing, replace the tray.
• Clean sensor area: Wipe the area under the tray where the sensor is located.
• Reinsert tray: Push the tray fully into place to ensure proper alignment.

If the warning remains, the internal sensor may be defective and require replacement.