What is a common symptom of a failed capacitor in an AC system?

A failed capacitor in an AC system frequently leads to the fan not operating. The capacitor plays a crucial role in providing the necessary torque to start the fan motor and keep it running, especially during the initial startup phase. If the capacitor is malfunctioning or has failed, the fan may not receive enough power or may fail to engage altogether, resulting in complete or partial inoperability of the fan.

When the fan is not operating, it can lead to several additional issues, such as reduced airflow across the evaporator coil, which can cause ice buildup and affect the overall cooling efficiency of the AC system. This problem can also place extra strain on other components of the system, potentially leading to further failures.

Understanding the role of the capacitor is vital for HVAC troubleshooting; therefore, identifying that the fan is not operating is a significant signal that the capacitor may require replacement or repair to restore proper function to the AC unit.