What is a common indication of high discharge pressure in a refrigerant system?

High discharge pressure in a refrigerant system can often lead to overheating the compressor. This occurs because when the discharge pressure is elevated, it indicates that the refrigerant is not effectively circulating through the system, which can create excessive strain and heat on the compressor. The compressor works harder to overcome the higher pressure, leading to elevated temperatures. If this condition continues, it could ultimately result in compressor failure due to thermal overload.

Insufficient cooling, frost on the evaporator coil, and airborne contaminants might correlate with other system issues but are not direct indicators of high discharge pressure. Insufficient cooling typically suggests problems with the evaporator or airflow issues rather than discharge pressure specifically. Frost on the evaporator coil indicates low temperatures, often due to low refrigerant levels or airflow problems, rather than high discharge pressure. Airborne contaminants can disrupt system operation but do not specifically signify high discharge pressure; they can impact overall efficiency and reliability without explicitly leading to an increase in discharge pressure.