The thing that sucks is I can hear what is making the noise in the compressor, and as far as I know it’s something loose, not normal operating sounds. The compressor housing is a welded ball of metal, there is no way to open or maintain it. I was so frustrated when I realized the sound was the compressor. I was praying the compressor wasn’t mounted properly, or was mounted without isolation pads, etc... but nope I got down there and put my ear on it (damn near burned myself) and waddaya know it’s coming from inside the welded ball.

For future reference, there are automotive stethoscopes avaliable with probes designed to reach into deep/inacessable places. Very handy tool to have, check your local auto parts store for mechanic's stethoscope.

AutoZone probably rents them, if you don't have the need to own one (I found one at a goodwill once for a dollar, so I bought it - never know).

Ironically, replacing the compressor with an older quieter model could likely be done, but would probably be illegal under some EPA law...

The newer ultra-high-speed compressors are supposed to be more efficient, but looking up some historical data on refrigerator energy consumption, I'm not so sure if that's true in general.