The answer to 'how to maintain preventive maintenance' is to regularly service and inspect your HVAC system. This includes cleaning or replacing air filters, checking refrigerant levels, inspecting electrical components, and cleaning the condenser coil. Proper preventive maintenance helps ensure your HVAC system runs efficiently, extends its lifespan, and prevents costly breakdowns.
It's recommended to have a professional HVAC technician perform a full system inspection and tune-up at least once a year, typically in the spring before the cooling season. Between professional visits, you can perform some basic maintenance tasks yourself, such as changing air filters every 1-3 months depending on usage and environment.