Weak airflow on forced-air systems at the registers is caused by all of these except:

Weak airflow on forced-air systems at the registers is caused by all of these except:

• A. Undersized burners
• B. Clogged evaporator coil
• C. Dirty filter
• D. Slipping fan belt on the fan motor

Answer: (A)

Weak airflow in forced-air systems can result from several issues, but undersized burners are not among the common causes affecting airflow at the registers. The primary function of the burners in a forced-air heating system is to heat the air that is distributed throughout the home; they do not directly influence the volume of air being circulated. When considering the other options, a clogged evaporator coil can obstruct airflow because it impedes the system's ability to effectively transfer heat and can reduce the volume of air that can pass through it. Similarly, a dirty filter restricts airflow by blocking the path of the air, which can lead to weakened pressure and reduced airflow out of the registers. A slipping fan belt on the fan motor can also lead to weak airflow because it affects the operation of the fan itself, reducing its ability to push air through the ductwork. Understanding the roles of these components helps clarify why the undersized burners do not contribute to airflow issues at the registers, while the other factors do impact the system's performance in this area.

Weak airflow in forced-air systems can result from several issues, but undersized burners are not among the common causes affecting airflow at the registers. The primary function of the burners in a forced-air heating system is to heat the air that is distributed throughout the home; they do not directly influence the volume of air being circulated.

When considering the other options, a clogged evaporator coil can obstruct airflow because it impedes the system's ability to effectively transfer heat and can reduce the volume of air that can pass through it. Similarly, a dirty filter restricts airflow by blocking the path of the air, which can lead to weakened pressure and reduced airflow out of the registers. A slipping fan belt on the fan motor can also lead to weak airflow because it affects the operation of the fan itself, reducing its ability to push air through the ductwork.

Understanding the roles of these components helps clarify why the undersized burners do not contribute to airflow issues at the registers, while the other factors do impact the system's performance in this area.