Solving root cause issues by listening to homeowners, measuring the system (house, duct, and/or equipment), and proposing options so homeowners can implement solutions based on their priorities and budget.
This maybe a repair, a health related issue, or comfort concern, often all of the above. Prescrition before diagnostics is malpractice.
Then installing said repair and verifying, ideally through both measurements and follow up that the issue has been corrected.