ESCO Air Conditioning Practice Exam 2025 – Complete Study Resource

The best approach to removing solid contaminants such as sludge and carbon from a severe hermetic compressor motor burnout is to flush the system and then install filter dryers in both the liquid and suction lines. Flushing the system involves circulating a cleaning solvent through the refrigeration system to dissolve and remove the contaminants that have accumulated. This step is crucial because residual sludge and carbon can lead to future compressor failures and other operational issues if not completely eradicated.

After flushing, installing filter dryers is essential to capture any remaining debris and moisture that could still be present in the refrigerant circuit. Filter dryers serve as a safeguard against potential contaminants entering the compressor and ensure a clean and efficient operation moving forward. This two-step process effectively addresses both immediate and long-term concerns related to system contamination.

The other options do not adequately address the need for thorough contaminant removal. Adding more refrigerant does not resolve contamination issues and can simply lead to further complications. Replacing all components is often unnecessary if the system can be cleaned and restored, as it would involve significant costs and labor without guaranteeing better performance. Using a desiccant may help manage moisture but wouldn't effectively remove solid particulates such as sludge and carbon from the system.