This is how the compressor looks:---
It has to replaced by proper refrigerator HVAc tech.
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Refrigerator is not cooling properly?
http://technoanswers.blogspot.com/2011/06/refrigerator-is-not-cooling-properly.html
Both refrigerator and freezer not cooling properly in refrigerator?
http://technoanswers.blogspot.com/2011/06/both-refrigerator-and-freezer-not.html