LG and Samsung both have this problem. I suffered from it for years - like clockwork every three months the fan would stop spinning and the fridge would stop wo

LG and Samsung both have this problem. I suffered from it for years - like clockwork every three months the fan would stop spinning and the fridge would stop working until I took a hair dryer to the built up ice behind the rear panel. Good news was it encouraged us to clean out our fridge on a regular basis! I eventually fixed it by ordering a new thermistor and relocating it on the line (I read about it in a service bulletin somewhere) I also replaced the warming probe at the bottom just in case it was blocking up but I don’t think that was the root cause. Once I took those actions, the fridge worked great. Unfortunately we now no longer have a clean refrigerator, however.