The answer to 'when to service replacement' is that you should service your HVAC replacement system regularly, typically every 1-2 years. Regular maintenance helps ensure your system is running efficiently and can extend its lifespan. This includes cleaning or replacing air filters, inspecting and cleaning the condenser coils, checking refrigerant levels, and testing the system's electrical components.
It's best to have a professional HVAC technician perform the maintenance service, as they have the right tools and expertise to properly inspect and service your system. They can also identify any potential issues before they become bigger problems.