Yes, you can troubleshoot your AC before calling a professional. Start by checking the thermostat settings to ensure it’s on the correct mode and temperature. Inspect the air filter to see if it's dirty or clogged, as this can restrict airflow. Next, check the circuit breaker to make sure it hasn’t tripped. Also, ensure the outdoor unit is free of debris and has proper clearance. If these basic troubleshooting steps don’t resolve the issue, it’s time to contact a professional technician for further diagnosis and repair.