How long does the cooktop surface stay hot after the elements are turned off?
The cooking surface will hold heat and remain hot for up to 25 to 30 minutes after the elements have been turned off. A letter 'H' will appear above the element touch pad as a hot surface indicator, remaining on until the cooking area has cooled to a safe-to-touch temperature. (Page 4)
From the official Bosch Cooktop manual, page 4
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