Once an HVAC unit crosses the 15-year mark, replacement often becomes more cost-effective than repeated repairs. Rising energy bills, frequent breakdowns, or difficulty maintaining temperature are key signs it’s time. You could have it assessed by Astera Services https://www.asteraservice.com/ , a licensed provider with strong experience in heating, cooling and appliance installing and repair. They can help determine if your system still has life left or if upgrading to a modern, energy-efficient model will save more in the long run—especially before peak seasons hit.