That usually means a sealed system problem. The evap coils behind the back wall are usually covered in a light frost, but when there isn't enough coolant circulating, the unit runs constantly and you get an ice ball on the left side about 2/3 of the way down the back wall.
Thank you, XXXXX XXXXX is a large area centered on the back .... say about 18" from the top about 12" from either side and it goes down the back about 2 - 2.5'. The technician who was here talked to me about the "ball" you're referring to, but this was more uniform, larger and centered ... a large square or rectangle.
What is the temp of the fridge?
Currently 45 degrees.
It should be 34 to 40 degrees. If the unit never reaches a low enough temp, it won't shut off the compressor. When the compressor shuts off, the above freezing temps allow the evap coils to defrost. Have you cleaned the condensor coils lately? Poor air-flow over the condensor can cause problems with the frost pattern..
Makes sense .... thank you so much!