Yes, you can troubleshoot some basic air conditioner issues yourself before calling a professional. Check and replace dirty air filters, ensure the thermostat is set correctly, and verify that the circuit breaker hasn’t tripped. Clean the area around the outdoor unit to ensure proper airflow and inspect for any visible debris or obstructions. If these steps don't resolve the issue, or if you encounter refrigerant leaks, electrical problems, or mechanical failures, it’s best to call a professional for safe and effective repairs.