[wwest]

Hmmmm...

I wonder...

Is the wider spacing ("poor" cooling efficiency) of the factory evaporator fins/tubes the reason the factory was able to use a sub-freezing "low" control point? With the wider fin spacing it would take a serious level, maybe an extraordinary level, of formation of frost or rime ice within those fins to mostly, or fully, block the "warming" system airflow. A frost or rime ice formation that did not fully bridge the space between the fins would most quickly thaw during the compressor off cycle.

But that does not answer my question, only gives it more "depth": Why would not the more tightly spaced, MORE efficient, cooling fins of these aftermarket evaporators have even a greater tendency to freeze up vs the factory cores.... Or do they??