Philips coffee maker frequently shows 'Empty grounds container' even when it has just been emptied.

Safety: Unplug the machine before inspecting sensors.

• Clean container and area: Wash the grounds container and dry it. Clean the area where it slides in, removing coffee dust that may block sensors.
• Check correct insertion: Slide the container fully into place until it stops. Ensure no objects obstruct its path.
• Inspect sensor: Look for a small switch or optical sensor near the container. Gently clean it with a dry cotton swab.

If the message persists, the sensor or control board input may be faulty and require service.