Temperature on refrigerator side was unstable. I was adjusting the thermostate control (center knob) frequently.

I followed the instructions shown in the on-line video for replacing the thermostate control. I had difficulty freeing the capilary tube from around the mechanical lever that controls the freezer side vent opening. I had to remove a screw that held the vent lever in place. This is a delicate activity. I was not happy with the way the on-line video delt with this particular issue. Otherwise, the video was right on and straight forward. The problem is fixed.