Air Conditioning Repair Certification (ETI) Practice Exam

A malfunctioning compressor can result from poor airflow or refrigerant issues because the compressor relies on a balanced flow of refrigerant and appropriate air circulation to function effectively. If the airflow to the evaporator coil is restricted—due to dirty filters, blocked ducts, or other obstructions—the system cannot efficiently absorb heat from the air. This leads to insufficient refrigerant vapor returning to the compressor, causing it to run inefficiently or even overheat.

Additionally, if there are issues with the refrigerant itself, such as leaks or improper charge levels, the compressor may experience pressure imbalances. This can further hinder its ability to compress the refrigerant properly, resulting in potential damage or complete failure. Maintaining proper airflow and refrigerant conditions is essential for the healthy operation of the entire air conditioning system and particularly vital for protecting the compressor against malfunctions.