39Power cutYour appliance can bridge a power cut of a fewseconds. Operation continues.If the power cut was for a longer period and theappliance was in operation, a message appears in thedisplay. Operation is interrupted.Set the function selector to 0, then the appliance canbe operated again as usual.Demo modeThe demo mode is activated if the ° symbol appearsin the display. The appliance does not heat up.Briefly disconnect the appliance from the mains(switch off the domestic fuse or the circuit-breaker inthe fuse box). Then deactivate the demo mode within 3minutes in the factory setting (see section entitledFactory setting).Replacing the oven interior lampFor technical reasons, the lamp cover is notdetachable. Only Gaggenau after-sales service mayreplace the lamp.9 CAUTIONDo not detach the lamp cover. This woulddamage the seal.The lamp cover in the oven must be replaced if it isdamaged. You can obtain covers from after-salesservice. Always specify the E number and the FDnumber of your appliance.Error message "Exxx" If an error message appears, turn theprogram selection to 0; if the displaygoes off, it was a one-time problem. Ifthe problem occurs repeatedly or if thedisplay stops, please contact after-salesservice and inform them of the errorcode.