Quick answer
Most central air conditioners and heat pumps last about 10–15 years, and gas furnaces about 15–20 years, according to general industry and U.S. Department of Energy guidance. Actual life depends on installation quality, sizing, maintenance, and environment.
What shortens equipment life
Dirty filters and coils make systems work harder. Refrigerant leaks strain compressors. Oversized systems start and stop more often. Near the ocean, salt air corrodes coils and fasteners. In inland valleys, long hot seasons add run hours.
Signs a system is near the end
Frequent repairs, rising energy bills, uneven temperatures, loud operation, and systems using the older R-22 refrigerant are all reasons to start planning. Planning ahead gives you time to compare options and check incentives.
