What issue may arise from improper airflow across the evaporator?

Improper airflow across the evaporator can significantly impede the cooling performance of a refrigeration or air conditioning system. The evaporator's primary function is to absorb heat from the space being cooled by allowing the refrigerant to evaporate, which removes heat from the air passing over the evaporator coils. When airflow is insufficient or disrupted, the refrigerant does not have adequate access to the heat in the air, which leads to a decrease in heat transfer efficiency. As a result, the system cannot remove as much heat from the air, leading to a failure to achieve the desired cooling effect.

Additionally, reduced airflow can cause a buildup of ice on the evaporator coils, further restricting heat exchange, and could potentially lead to system malfunctions or increased wear and tear on components. Hence, maintaining proper airflow is crucial for maximizing the cooling performance of a system.