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So this error means that the touch control panel has failed. Try to unplug the oven for 5 minutes to see if the electronics will reset. If that doesn't work, then unfortunately the touch control panel would need to be replaced to fix this oven and the part alone is almost $1000 so it may not be worth fixing I'm sorry to say. The part number you'd need is WB27K10055 for your model number.
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