The refrigerator is no longer cooling. The compressor (I think) makes an intermittent buzzing sound and then cuts out, can't start. After I left it overnight to cool off, it started right away when I plugged it in, but then crapped out again. This happened before several months ago and now this time I can't seem to get it to work. Changing the relay didn't work. Also, tested the compressor for grounding and everything on all posts seems ok. Maybe the compressor is shot.