System Lockout Signals When Your AC Demands Immediate Replacement Rather Than Repair

https://sacramento-precision-hvac-affordable-sac-sac-ca5294.zenbloomer.com/posts/when-15-20-year-old-hvac-units-need-staged-assessment-before-replacement

Your AC unit hits a critical threshold when it stops cooling entirely and won't respond to thermostat commands—that's the moment replacement becomes necessary