What should I do if, after the cooking zones have been switched off, residual warmth is not indicated in the display?
Check for the following possibility:
•The cooking zone was only briefly used and therefore did not become hot enough. If the cooking zone is hot, please call the customer service centre.
What should I do if the cooking zone will not switch on or off?
This could be due to one of the following possibilities:
•The control panel is partially covered by a damp cloth or liquid.
•The child safety lock is on.
What should I do if the 
display is illuminated? Check for the following:
•The control panel is partially covered by a damp cloth or liquid. To reset, press the “On/Off” control sensor.
What does it mean when the burner does not glow red?
•The selected temperature of the cooking zone is maintained by a sensor that cycles the zone on and off, so the surface cooking area will not always glow red. If
you select a low heat setting, the heat will cycle on and off more frequently than at higher settings. The heat also cycles on and off at the highest setting.
What should I do if the 
display is illuminated?
Check for the following:
•The hob is overheated because of abnormal operation.
•After hob is cooled down, press the “On/Off” control sensor for resetting.
If you request a service call because of an error made in operating the appliance, the visit from the customer service technician may incur a charge even during the warranty period.