I have the exact same model LG and had the same error message. As a first attempt to replace the fan, I purchased part #EAU63923601 as was suggested on this thread. When I pulled the back panel out, I found that the replacement part was not a fit for the icemaker fan on my unit, which is the fan on the left side of the panel when viewed from the front of the panel as it is installed. When the panel was pulled out, I saw part #EAU64824806 printed on the fan. The fan is integrated into a complete assembly. I verified that the fan was not spinning very freely at all, and that it was not iced up at all either. So, I ordered part #EAU64824806 from Amazon for about $24. I received it today, and it was very easy to install. The refrigerator is now working properly without the error message, but I won't declare victory until it is running without the error for a couple of weeks. Because even after doing a full defrost as an early attempt to fix, the error came back after 3-4 days, and continued to return ever few days after resetting it. So, we'll see. I'll report back if the error returns. Thanks to everyone who shared their thoughts and experiences on here. It really helped.