While I agree with the above comments, I came here looking for more info. One thing not mentioned here is the possibility of a freon (coolant) leak. I suspect this is what is wrong with my fridge since all of the other "Cause x) possibilities have been checked. Testing for a freon leak is beyond my capabilities or available tools. A soap bubble test is limited to areas that are within my reach but there are so many other areas. And if all the freon has escaped from the sealed system will a bubble test even work at all?