The answer to 'when to service tune-up' is that you should have your HVAC system serviced and tuned up at least once a year, typically in the spring before the heavy cooling season begins. Regular maintenance helps ensure your system is running efficiently and can catch any potential issues before they become major problems.
During a tune-up, an HVAC technician will inspect the system, clean the coils, check refrigerant levels, lubricate moving parts, and make any necessary adjustments or minor repairs. This helps extend the lifespan of your HVAC equipment and keeps it operating at peak performance.