I am sorry to hear you are experiencing this issue. I am providing a link with troubleshooting steps. Let me know the results.
We just replaced the ice maker due to it not harvesting ice, and were told the entire unit needed to be replaced. We install the new one, and the entire freezer stops freezing. We have taken the ice maker completely out and now it is holding at 40 degrees. Freezer was working just fine before we installed the new ice maker and nothing was iced over. Any suggestions?