How important is airflow across an evaporator in a properly operating air conditioning system? If you ask a wide range of technicians you are likely to get many different answers, but the general consensus would likely be that it is important.
But rephrase the question and ask, "how often do you check the airflow across an evaporator?" and you would likely get a response of “not too often.” This could be a mistake and could possibly lead to misdiagnosing a system problem.