The answer to 'when to service preventive maintenance' is that HVAC systems should undergo regular preventive maintenance at least once a year, typically in the spring or fall before peak usage seasons. This helps ensure the system is running efficiently, extends its lifespan, and prevents costly breakdowns.
During a preventive maintenance service, an HVAC technician will inspect the system, clean and tune-up components, check refrigerant levels, and identify any issues before they become major problems. They may also recommend replacing air filters, cleaning the condenser coils, and other tasks to keep the system in top shape.