Kenmore 51789 Fridge - Trying to Troubleshoot Defrost Problem
I would agree that it looks like the Tstat. Is the fan circulating air, this is one issue that can also cause problems and if ice dams form at the bottom even if everything else is working the freezer will start to warm up because the cold air can not circulate. I gave up on world pool / Kenmore after my last elite fridge freezer was a basket case under warranty and I have epa licenses so it turned into a pop cooler in the barn.