If a strong odor is detected during refrigerant recovery, what is likely to have occurred?

A strong odor detected during refrigerant recovery is typically indicative of a compressor burnout. When a compressor overheats or fails, it can lead to the breakdown of the oil within the system. This degradation can produce a burnt or acrid smell, often signifying that the oil has been contaminated with carbon or other debris produced during the failure of the compressor.

This situation presents serious concerns, as a compressor burnout can lead to the need for extensive system repairs or even a complete system replacement. It can also introduce harmful contaminants into the refrigerant, complicating recovery and reclamation processes.

While the operation of the condenser, improper oil installation, or electrical issues like power surges can lead to various problems in a refrigeration system, they do not typically produce the distinct strong odor associated with compressor burnouts. Thus, the presence of a strong odor is a clear indicator of the issues stemming directly from compressor failure.