453. To change the light bulb, undo thecross head screw and remove the lightbulb cover.4. Change the defective light bulb.5. Refit the light bulb cover and thecross head screw.6. Put the refrigerator back into operati-on.AEG65Customer ServiceIf you cannot find the remedy for a malfunction in these operatinginstructions, please contact your dealer or our customer servicedepartment. Addresses and telephone numbers are listed in the accom-panying booklet "Guarantee Conditions/Customer Service Locations".Selective ordering of replacement parts can save unnecessary traveland costs. For this reason always provide the following applianceinformation:• Model Name• Model Number (PNC)• Serial Number (S-No.)This information can be found on the serial plate in the interior at theleft of the appliance. We recommend that you enter this informationhere, so that it is handy if needed.Note: The customer bears the costs of unjustified customer servicecalls even during the guarantee period.Noises during OperationThe following noises are characteristic of refrigeration appliances:• ClicksWhenever the compressor switches on or off, a click can be heard.• HummingAs soon as the compressor is in operation, you can hear it humming.• Bubbling/SplashingWhen refrigerant flows into thin tubes, you can hear bubbling orsplashing noises. Even after the compressor has been switched off,this noise can be heard for a short time.