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It certainly sounds like you have a lemon if it's only 2 months old and you're running into this problem. If the unit warmed up this quickly and the compressor is still running, either the compressor has failed and needs to be replaced or your freon system formed a leak and leaked all the freon out. If it's under warranty still then call warranty, otherwise the repair is going to be rather expensive since a new compressor is about $650 and a freon leak is about $450 to have repaired.