It's Fixed
Hey Rick, the fridge was just plain dead and the cold control wouldn't do anything no matter how cold it was set. Since the cold control had been acting weird over the past few days, I decided to pull it and see if I had any luck with hooking up the replacement cold control. I connected the replacement just by the wires, set it at about half way, plugged the fridge in, and it began to run.
I finished the job of installing the replacement control and about half an hour ago I fired things up with the control set at mid-range.
I really, really hope this has fixed the problem. I had always suspected the original cold control had problems, but it seemed be doing fine recently. Then the temp started to slowly creep up, and when I set it a little colder, the fridge ran all night and the next morning the cabinet temp was 33 and things were freezing. Adjusted it downward and then it got all confused, and eventually stopped working at all. That's when I began to worry about the compressor. I definitely think the old cold control is toast at this point.