30What to do if …Rectifying faultsIt is possible that faults have been caused by a minor error, which youcan correct yourself with the help of the following instructions. Do notattempt any further repairs if the following instructions do not help ineach specific case.1 Warning! Repairs to the appliance are only to be carried out by ap-proved service engineers. Improperly effected repairs may result in con-siderable risk to the user. If your appliance needs repairing, pleasecontact your specialist dealer or customer service.If the ceramic glass hob is broken, please quote the 3-digit number onthe glass hob when contacting customer service.What to do if …… the cooking zones are not functioning.Check whether– the fuse in the house wiring (fuse box) is intact. If the fuses trip anumber of times, please call an authorised electrician.– the appliance is properly switched on,– the control lamps in the control panel are illuminated,– the relevant cooking zone is switched on,– the cooking zones are set at the desired settings,– the cooking zones’ safety switchoff function has been activated (see“Safety” chapter).… you cannot switch on the cooking zones.Check whether– a period of more than 10 seconds has elapsed between when the On/Off button was actuated and the desired cooking zone switches on(see chapter “Switching on the appliance”).– the sensor panels are partially covered by a damp cloth or liquid.… the display suddenly disappears except for h for residualwarmth.Check whether– the On/Off button was accidentally actuated.– the sensor panels are partially covered by a damp cloth, liquid or sim-ilar.– the safety switchoff function has been activated.