Siemens EH675TK11E, Repair Instruction, Page: 80 / 113

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5.10 Checking of broken glass
5.10.1 Problem
The glass has broken. The enamel from the pot has become welded
to the vitroceramic glass.
5.10.2 Cause

Generally-speaking, cases involving the breakage of glass are
caused by a strong increase in temperature to the base of the
pot (over 400ºC). The heat from the pot is transferred to the
glass (in fact, it can even weld enamel and glass) and the high
temperature causes the glass to break.

This has been seen to occur when using pots in bad
conditions , with cracks or scratches: the inducted currents
“avoid” these areas and concentrate in specific areas, which
generate extremely high temperatures.

Another possibility is with thinly enamelled pots or pots in bad
states of disrepair: the flatness of the base is lost in the centre
and the defective contact with the plate gives rise to areas with
extremely high temperatures.