Red Seal Refrigeration and Air Conditioning Mechanic Practice Exam

Compressor overheating in a refrigeration system can be attributed to insufficient refrigerant levels and poor airflow. When there is not enough refrigerant in the system, the compressor tends to work harder to maintain the desired temperatures, leading to increased operating temperatures. Insufficient refrigerant can also hinder proper heat absorption, causing the compressor to run continuously without effectively completing the cooling cycle, which exacerbates heat build-up.

Additionally, poor airflow across the evaporator coils can also significantly contribute to overheating. If airflow is restricted due to dirty filters, duct blockages, or inadequate ventilation, heat cannot dissipate efficiently. This will force the compressor to exert more effort to achieve the desired cooling, resulting in higher temperatures and potentially leading to compressor damage or failure.

By ensuring proper refrigerant levels and maintaining good airflow, the risk of overheating can be minimized, promoting efficient system operation and longevity.