The answer to 'how to fix central air' is to first check the air filter and clean or replace it if dirty. Next, inspect the outdoor unit and clear away any debris or obstructions around it. You can also use a garden hose to gently clean the condenser coils. If the system is still not cooling properly, you may need to have a professional HVAC technician inspect it for more complex issues like refrigerant leaks, electrical problems, or faulty components.
Regular maintenance of your central air conditioning system is key to keeping it running efficiently and preventing major breakdowns. It's recommended to have your system serviced by a professional HVAC technician once a year, typically in the spring before the cooling season begins.