Air Conditioning Repair Certification (ETI) Practice Exam

A clogged filter drier significantly impacts the performance of a residential split system by preventing refrigerant flow. The filter drier functions primarily to remove moisture and contaminants from the refrigerant before it circulates through the system. When the filter drier becomes clogged, it creates a blockage in the refrigerant line, which restricts the flow of refrigerant throughout the system.

This restriction can lead to a number of issues such as reduced cooling effectiveness, increased pressure within the system, and potential damage to the compressor. If the refrigerant cannot circulate properly, the evaporator coil may not get enough refrigerant to absorb heat effectively, resulting in poor or inadequate cooling. Therefore, understanding the importance of maintaining a clean filter drier is essential for ensuring optimal airflow and overall system performance in residential air conditioning systems.