Seven-Year-Old AC Units Show Measurable Capacitance Decline and Amperage Drift
https://sacramento-precision-hvac-affordable-sac-sac-ca5294.zenbloomer.com/posts/establishing-a-maintenance-schedule-prevents-hvac-failures-across-12-month-cycles
A 7-year-old AC unit is approaching middle age through the lens of component specifications and measured test data