Above All Signs, Reduced Airflow Signals Time for HVAC System Replacement

https://sacramentoprecisionhvac-local-sac-near-mcdonald-hearing-aid2826.readspirex.com/posts/identifying-which-parts-fail-between-12-and-17-years-determines-repair-versus-replacement

Yes, you should replace your HVAC system before it fails if airflow has noticeably declined despite repairs