What is a common symptom of low refrigerant levels in an air conditioning system?

Icing on the evaporator coils is a well-known symptom of low refrigerant levels in an air conditioning system. When the refrigerant level is low, it can cause the evaporator coils to become too cold because there isn’t enough refrigerant to absorb the heat from the indoor environment effectively. As the temperature of the coils drops, any condensation on the coils can freeze, leading to an accumulation of ice. This ice build-up can further restrict airflow through the system, causing additional cooling issues and reducing the overall efficiency of the air conditioning unit.

Recognizing icing as a symptom allows HVAC technicians to diagnose low refrigerant levels and address the issue promptly. This understanding underscores the importance of regular maintenance and monitoring of refrigerant levels to prevent more significant problems with the air conditioning system.