Ensure that the drip tray is completely clean and there's no water present where coffee would normally drip from. Dirt often gets accumulated at the narrowest part of the drip tray, making the Jura machine believe there is water in the drip tray. It is a good idea to wipe the sides of the drip tray. If there is water in the drip tray, it should be cleaned and dried before running the Jura machine.