The unit is 6 years old and just yesterday stopped cooling. I had a repair guy come out to look at it and told me that the compressor was bad and needed to be replaced. I found the part but how hard would it be for a reasonably mechanical person to switch out this part? The repairman told me that it was very hard to replace the part. He said that the part was $250 and that labor would be another $200, but I found the part for $165 and was hoping to be able to switch it out myself. Please help. :)