When you claim that they changed the entire assembly, I'm curious.Which component number did they swap out? There is a Facebook group called SAMSUNG REFRIGERATOR RECALL U.S.A. NOW with approximately 100,000 members if you want to learn more about this. This is a typical issue with these devices. After five years of flawless operation, I'm still attempting to pinpoint why this occurs. In five years, something had to change. This group has informed me that there is dampness in the refrigerator's walls and that it really can't be mended.However, I can't say for sure that this is true. Moisture is causing the top of the evaporator to freeze up, which then hits the fan as a block of ice. The ice expands till it generates noise by striking the fan. But it's not just the noise. The fan will stop when the ice block is big enough, and the refrigerator won't run again until the ice is gone. I have done a lot of reading and talked to some technicians about all of this.