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Because LG made it.
Sorry, there was a problem. Please try again later.We hate to hear the knock feature of your refrigerator stopped working. We would love to look into this for you. Please reach out to a specialist via Twitter @LGUSSupport or Facebook https://www.facebook.com/LGUSA/ or you can give us a call at 800-243-0000 so we can help you with this. ^CP
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