What symptom may indicate a refrigerant overcharge in a capillary tube air conditioning system?

The indication of high suction pressure in a capillary tube air conditioning system is a notable symptom of refrigerant overcharge. When there is an excessive amount of refrigerant in the system, it can lead to higher pressure readings on the suction side. This occurs because an overcharged system doesn’t allow sufficient space for the refrigerant to expand and properly vaporize; as a result, the pressure builds up instead of falling to desired levels.

In an air conditioning system, under normal operating conditions, the suction pressure should be low enough to ensure that the refrigerant can absorb heat effectively. When overcharged, the system struggles with proper refrigerant flow and can potentially lead to further issues, such as inadequate cooling performance and increased wear on system components. Recognizing the symptoms of high suction pressure can help technicians diagnose refrigerant overcharge issues and address them accordingly.