What is a likely cause of high discharge temperatures in a compressor?

High discharge temperatures in a compressor can often be attributed to insufficient evaporator cooling. When the evaporator is unable to properly cool the refrigerant, it leads to higher temperatures being passed on to the compressor. This is typically due to a variety of factors such as an improperly functioning evaporator coil, inadequate airflow across the evaporator, or issues with the refrigerant charge. As the compressor works harder to compress the hotter refrigerant vapor, temperatures at the discharge side rise significantly, which can lead to inefficiencies and potential damage over time.

Other options present scenarios that might impact system performance, but they do not directly correlate with the increase in discharge temperature in the same way.