What occurs when air flow through the evaporator coil is restricted?

When airflow through the evaporator coil is restricted, the heat exchange process is negatively affected. Normally, the evaporator coil absorbs heat from the air being circulated through it. If the airflow is restricted, less heat can be absorbed. This leads to a drop in the refrigerant temperature, causing it to become very cold. As a result, the suction pressures in the system can drop significantly, which can lead to the formation of frost on the suction line.

In this situation, the refrigerant may not have sufficient airflow to facilitate the usual heat transfer. The cold refrigerant, when combined with the restricted airflow, fails to efficiently absorb heat, and frost can form on the suction line due to lower temperatures. This combination of low airflow, low suction pressure, and the presence of frost correctly identifies the effects of restricted airflow through the evaporator coil. The other options do not accurately reflect the consequences of airflow restriction in this context.