Most home inspectors will do a visual inspection of the HVAC system, l check to see if it’s running, and if there is any external damage. Though home inspectors are experts in the home itself, most don’t have the technology to run a full diagnostic check. Using a professional HVAC technician to run a comprehensive report can give you a deeper dive into the age, performance, and efficiency of the unit, as well as identify any potential “pain points” a home inspector may have missed.