Common AC repair issues can include refrigerant leaks, frozen coils, faulty thermostats, and clogged filters. To fix these problems, it's important to address their underlying causes. For refrigerant leaks, a professional HVAC technician should be called to locate and repair the leak before recharging the system. Frozen coils can be resolved by checking and cleaning the air filters, ensuring proper airflow, and fixing any issues with the refrigerant levels. Faulty thermostats may require recalibration or replacement. Clogged filters can be cleaned or replaced to restore optimal airflow. If you're experiencing any of these common AC repair issues, it's best to consult with a trusted HVAC professional, such as AC Plus Heating & Air, for accurate diagnosis and effective solutions.