On this particular call the refrigerator had started working before I got there. It’s tough to repair an appliance that isn’t acting up while you are on site. The refrigerator is a Amana ( SXD23VW ) side by side. I do the usual and make sure all of the components are functioning. They were. I did find heavy lint build up on the fan grille on the back. It even looked like some of the build up had fallen off of the grille. Maybe this allowed enough of the heat to escape to where it started working again? I cleaned the grille assuming this was the original problem. The customer also told me that the area where the 2 doors closed had been very hot. This was another indication that I had probably found the problem.