The answer to 'when to service mini split' is that mini split systems should be serviced at least once a year, typically in the spring before heavy cooling season. Regular maintenance helps ensure your mini split system runs efficiently and avoids costly breakdowns.
During an annual service, an HVAC technician will clean the indoor and outdoor units, check refrigerant levels, inspect all electrical connections, and perform other maintenance tasks. They may also recommend replacing air filters or other components depending on the system's condition.