The $5000 Emergency Threshold Separates Immediate Repair from Total System Replacement
https://precisionhvacrepaircorner.huicopper.com/30-year-old-hvac-units-lose-heating-or-cooling-capacity-and-need-urgent-attention
The $5000 rule for HVAC is a critical emergency go-no-go threshold: if repair costs reach or exceed half your system's remaining useful life value, immediate intervention becomes a safety and financial decision point