ESCO Air Conditioning Practice Exam 2025 – The All-in-One Guide to Exam Success!

An inefficient compressor often operates under conditions that reflect a discrepancy between the head pressure and the suction pressure. In this case, higher than normal head pressure alongside lower than normal suction pressure indicates that the compressor is struggling to effectively compress the refrigerant.

When the head pressure is elevated, it suggests that the system is experiencing higher resistance in the discharge side, which could be due to a variety of factors such as a blockage in the condenser, excess refrigerant charge, or a malfunction in the expansion device. At the same time, lower suction pressure indicates that the compressor is not drawing in enough refrigerant vapor, which can be a result of insufficient cooling or an issue with airflow on the evaporator side.

Therefore, this combination of higher head pressure and lower suction pressure highlights a situation where the compressor is not functioning efficiently, potentially leading to increased wear, reduced performance, and higher operating costs. This scenario serves as a clear signal for technicians to investigate the root cause of these pressure readings to restore the system to optimal operation.