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HVAC Advice

How Long Do AC Units Last? A Realistic Guide

Updated January 2026 • 5 min read

Quick Answer: Most AC units last 10-15 years. In Texas, where systems run 8+ months per year, expect closer to 10-12 years. Well-maintained systems can reach 15-20 years, but efficiency drops significantly after 12-15 years.

Average Lifespan by Equipment Type

Central Air Conditioner

Average: 10-15 years
Condenser unit outside typically fails first. Indoor evaporator coil may last longer.

Heat Pump

Average: 10-15 years
Runs year-round for both heating and cooling, so may wear faster than AC-only systems.

Gas Furnace

Average: 15-20 years
Generally longer-lasting than AC components, but heat exchangers can crack with age.

Texas Climate Impact

Texas is hard on AC systems. Here's why lifespans are often shorter here:

  • Extended cooling season: AC runs 8-9 months per year
  • High humidity: More work to remove moisture from air
  • Extreme heat: Systems work harder on 100°+ days
  • Coastal salt air: Corrosion on outdoor components (Houston area)

Signs Your AC is Nearing End of Life

Time to Start Planning:

  • System is 10+ years old
  • Repairs becoming frequent (multiple per year)
  • Energy bills increasing without rate changes
  • Uneven cooling or can't keep house comfortable
  • Uses R-22 refrigerant (phased out)
  • Major component failure (compressor, heat exchanger)

How to Extend Your AC's Life

  • Change filters regularly: Monthly during cooling season
  • Annual maintenance: Professional tune-up catches problems early
  • Keep outdoor unit clear: 2 feet of clearance around condenser
  • Shade the outdoor unit: But don't block airflow
  • Address repairs promptly: Small problems become big ones

The 50% Rule

General guidance: If a repair costs more than 50% of a new system's price, and your system is over 10 years old, replacement often makes more sense. You get a full warranty, better efficiency, and years of trouble-free operation.

Wondering About Your System's Age?

We can assess your system's condition and give you an honest timeline—no pressure to replace if it's got years left.

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