If your AC is running but not cooling, several factors could be at play. It might be due to low refrigerant levels, a dirty or blocked air filter, a malfunctioning compressor, issues with the thermostat, or even a refrigerant leak. Restricted airflow or a faulty condenser unit could also contribute. Regular maintenance, like cleaning filters and coils, can prevent some problems. If the issue persists, it's best to contact a professional HVAC technician to diagnose and resolve the underlying cause of the cooling problem.