Upon reaching 12 to 15 years, compressor and capacitor failures account for most HVAC breakdowns

https://articlegrovey.com/s/w10RD-opIJzPPAZQ6Z2e_

A properly maintained HVAC system typically lasts 12–15 years, but component-level failure—especially compressor breakdown or capacitor burnout—often determines actual lifespan well before that