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There is a malfunction. 10 Display Description Residual heat indicator: a cooking zone is still hot. The lock/child safety function is on. The Power function is on. The automatic heat-up function is on. ACTIVATING AND DEACTIVATING THE HOB Touch for 2 seconds to activate the hob. Touch for 1 second to deactivate the hob. HEAT SETTING Touch to increase the heat setting. Touch to decrease the heat setting. The display shows the heat setting. Touch and at the same time to deactivate the cooking zone