AEG 79902G-M Operating Instructions Manual page 22

If after all these checks, your hob still does not
operate correctly, contact your local Service
Force Centre.
Please note that it will be necessary to provide
proof of purchase for any in-guarantee service
calls. In-guarantee customers should ensure
that the above checks have been made as the
engineer will make a charge if the fault is not a
mechanical or electrical breakdown.
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