If your box malfunctions, the first thing to try is to unplug and replug it. This 'restart' may be all that is needed. Also, ensure the tray is not full and the box is clean. Check for any visible obstructions. If you are continuing to experience issues, contact the manufacturer for advice.If your box malfunctions, the first thing to try is to unplug and replug it. This 'restart' may be all that is needed. Also, ensure the tray is not full and the box is clean. Check for any visible obstructions. If you are continuing to experience issues, contact the manufacturer for advice.