52CHAPTER 3 - CLEANING AND MAINTENANCE3.2 MAINTENANCEIn the case of malfunction or defective operation, contact a technical service centre authorised by the manu-facturer. Before contacting us, however, it is worth carrying out the following simple controls.CAUSE/SOLUTION• The door is not closed properly.• The plug is not correctly inserted.• There is no power to the mains socket (check the fusebox).• When cooking food containing water, it is completely nor-mal for steam generated inside the oven to be given off andcondense inside the oven, on the cooking surface or aroundthe door.• Never turn the oven on without food when using microwa-ve or combined functions.• When using the above functions, do not use metal contai-ners or bags or packs with metal staples.• Select the correct function or increase cooking time.• The food was not completely defrosted before cooking.• Select the correct mode or reduce cooking time.• Stir food during cooking.Bear in mind that food cooks better when cut into even-sized pieces.• Turntable rotation has not been switched on.PROBLEMThe oven does not work.Condensation on the support surface, inside theoven or around the doorSparks inside the oven.The food does not heat or cook properly.The food burns.The food does not cook evenly.NOTE: If the oven light malfunctions, you can continue using the appliance without problems.To replace the bulb, contact an authorised service centre.