Most central air conditioners last about 10 to 15 years with good care. In Palm Beach County, systems often land at the lower end of that range, because they work harder than they would in a cooler climate.
Why Florida systems wear out faster
- Constant use. Our systems run most of the year, so a 12-year-old system here has put in many more hours than one in a northern state.
- Humidity. Constant moisture promotes algae in drain lines, rust and mildew.
- Salt air. Near the ocean and the Intracoastal, salt corrodes outdoor coils, fins and electrical parts.
- Heat. Attic air handlers work in extreme temperatures.
- Storms and power surges. Surges damage compressors and control boards.
What helps a system last
- Change the filter regularly, usually every 1 to 3 months.
- Service it twice a year. Clean coils and drains and a checked electrical system last longer.
- Keep the outdoor unit clear of plants, debris and anything blocking airflow.
- Fix small problems early. A weak capacitor, left alone, can damage the compressor.
- Consider surge protection, especially in storm-prone areas.
- If you are near the coast, ask about coil cleaning and protective coatings.
Signs the end is near
- Repairs are becoming frequent
- Bills are rising even though your habits have not changed
- The system uses R-22 refrigerant, which has not been produced or imported since 2020
- It is loud, or the outdoor unit is rusting through
- Some rooms are always too warm or too cold
When to start planning
Around the 10-year mark, start thinking about what you will do when the time comes. Planning ahead lets you compare options and financing calmly, rather than making a rushed decision in a heat wave. Read our guide to repair or replace.