Customer complained of a water leak in the rear of refrigerator, removed access panel to suction line completely iced over. The unit temperatures are good, the frost pattern on the coil is good. People just got this unit from their son, they nothing about it other than their got it at a scratch & Dent sale from HD and it came with the problem. HD sent repair person, who evacuated & recharged (1 BPV21) on the suction line. Thought maybe overcharge but no. Removed access panel to expose the Evaporator, all appeared good in there, but low & behold the frosted suction line began to thaw, replaced the panel it began to frost over again. I know that restricted airflow will cause this condition but all is clear. I did notice that this coil appears to be too large for this unit, it is like almost pressed in, with zero clearance on the sides, the defrost heater has burned the cabinet liner at both lower sides of the evaporator. I'm stymed, any suggestions out there?