My fridge has been very loud for probably a month. I was pretty sure it was going to be the compressor, because Samsung fridges are lousy with compressor issues. The the type of sound was a loud, mechanical buzzing. After playing around with a frequency generator, it sounded about 120 Hz. That wasn't a diagnostic tool, I looked it up just now to try to convey the noise to you.

Anyway, after pulling the fridge out and getting my ears back there, it was clearly not the compressor. But it was coming from the bottom of the fridge. So, it pretty much had to be the blower in the freezer. The hardest part was getting the drawer out. I saw tutorials where they just lift out the plastic bins, and there was no way I could get mine out. Mine did not fit out when the drawer was pulled out. I checked the manual. It says they just lift out. The manual also had dimensions of the drawer when pulled out, and I found my drawer was short by 6 inches! The stupid telescopic rails were stuck! I gave it a really good yank, and the drawer pulled out the entire 21 inches. I have no idea how long we have not had full drawer access. Makes getting ice cubes out a lot easier.

So, got it pulled apart, found the blower. Tested that it was the noise. It was. And I looked for a replacement. The OEM blower assembly was $143! I was taken aback. I found a third party blower on Amazon for $25. Went with that. That came last night, and I installed it during lunch today. Took 45 minutes.

I have a neighbor with nearly the same fridge, that had nearly the same issue. Except it was the circulating blower in the upper fridge portion. His wife insisted they call Samsung to come out for the repair. It cost them $1000.