The answer to 'how to maintain HVAC system' is to perform regular maintenance and cleaning to keep your HVAC system running efficiently. This includes changing air filters every 1-3 months, cleaning the outdoor condenser unit, and scheduling annual professional tune-ups.
Proper HVAC maintenance helps extend the lifespan of your system, improves indoor air quality, and reduces energy costs. It's important to follow the manufacturer's recommended maintenance schedule and address any issues promptly to avoid more expensive repairs down the line.