What is a common indicator of a system in need of servicing?

A common indicator of a system in need of servicing is the presence of frost near components. Frost formation often indicates that there is a problem with the system's airflow or refrigerant levels. When the system does not receive adequate airflow, it can lead to the evaporator coil temperature dropping too low, resulting in moisture from the air freezing onto the coil and surrounding components. This can impede system efficiency and potentially lead to further damage if not addressed.

While high performance efficiency and stable pressure readings are signs of a well-functioning system, and increased temperature in the compressor could indicate various issues, frost is a clear, visible symptom that typically necessitates immediate attention to prevent further complications.