In the textbook, Refrigeration & Air Conditioning Technology by Bill Whitman, Bill Johnson, John Tomczyk, and Eugene Silberstein, the authors wrote, “When the service technician arrives at the job, it may be necessary to evaluate whether a particular evaporator is performing properly. This can be considered one of the starting points in organized troubleshooting.”
It just so happens that the starting point typically is configured with tubes and fins that allow the evaporator to absorb the heat so the compressor can pump the heat and the condenser can reject it. And, as students-turned-technicians know, there are a number of coil configurations and technologies morphing with the times.