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So yes, if the cooktop still heats up, this is a common issue where the L2 relay on the display board shorted out so the entire display/timer will need to be ordered and replaced to resolve the issue I'm sorry to say. Below is a link to the display board you'd need to order for your model number.
CLICK HERE for display board
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It's easy to replace, all plug and play. So if you're willing to replace the part yourself I think it's definitely worth repairing since the part will be less than $200.
Hello again. I'm just following up because I haven't heard back from you and I see this question is still open. Is there anything else I can help you with?