What can occur if the evaporator fan fails?

The failure of the evaporator fan can lead to reduced airflow and ineffective cooling within the cargo area, making this the correct choice. The evaporator fan is responsible for circulating air over the evaporator coils, which absorb heat from the cargo area. When the fan is not functioning properly, air movement is greatly diminished, leading to inadequate cooling. This can cause the ambient temperature in the cargo area to rise, potentially jeopardizing the integrity of the perishable goods stored within.

While increased humidity in the cargo area can be a consequence of inadequate cooling, the primary and most immediate effect of a failed evaporator fan is reduced airflow, which directly impacts the cooling efficiency. Enhanced energy consumption typically occurs with inefficient systems, but in this scenario, the immediate concern is the failure of adequate cooling and airflow. Improved temperature regulation would not be a result of a malfunctioning evaporator fan; rather, the opposite would be true, as temperature regulation relies heavily on consistent airflow to maintain desired conditions.