The answer to 'when to service inspection' is that HVAC systems should be serviced and inspected at least once a year, typically in the spring or fall before the peak heating or cooling season. This annual maintenance helps ensure your HVAC system is running efficiently and can catch any potential issues before they become major problems.
During a service inspection, an HVAC technician will thoroughly inspect the system, clean and maintain the components, check for any wear or damage, and make any necessary adjustments or minor repairs. They'll also provide recommendations for any larger issues that may need to be addressed.