Final answer:
An A-coil can contribute to furnace overheating only in certain conditions, such as when the coil is dirty or airflow is obstructed.
Step-by-step explanation:
An A-coil, which is part of the furnace’s air handling system, can potentially contribute to a furnace overheating. However, the correct answer to whether an A-coil can contribute to a furnace overheating is c. Only in certain conditions. The A-coil, typically found in the indoor unit of a central HVAC system, can cause overheating if the coil is dirty or blocked, which would prevent adequate airflow. Clean and well-maintained A-coils are designed to transfer heat effectively and should not cause the furnace to overheat. But, if airflow is impeded or the system is improperly sized, it can lead to overheating problems.
The efficiency of a system, whether an automobile engine or a furnace, is often affected by temperature and heat transfer mechanics. For instance, the efficiency of a furnace can vary in different geographic regions and can be influenced by the compatibility of the coil installed, as variations can slightly impact the heating efficiency rating.