What is the most probable cause of noise in a compressor after a large leak in the liquid line has been repaired?

When a large leak in the liquid line of a refrigeration system is repaired, the most probable cause of noise in the compressor is low oil in the system. This situation may arise because the loss of refrigerant during the leak can also lead to a loss of oil that is circulated with the refrigerant. If the compressor operates with insufficient oil, the lubrication required for smooth operation is compromised. This can lead to increased friction, overheating, and ultimately noise as parts of the compressor work harder than they should to maintain operation.

In addition, a compressor generally relies on a combination of refrigerant and oil for efficient operation, and any disruption in this balance can create mechanical stress and cause unusual sounds. This noise may present as knocking, rattling, or grinding, indicating that the moving parts are not adequately lubricated.

While an overcharge or undercharge of refrigerant can also lead to noise, these issues would present differently and not as predominant as the lubrication issue caused by low oil, especially given the context of a recent leak repair. Air in the system is another consideration, but it usually results from improper charging or maintenance practices, rather than being a direct result of a leak repair. The focus on oil levels related to compressor operation makes low oil the