How Long Does an AC Unit Last in Florida?

Written and reviewed by Daniel ArgotaUpdated 2026-10-30

An AC unit in Florida usually lasts 10 to 15 years, according to Fort Myers contractor Gulf Shore Cooling ¹. Carrier’s national average is higher, at 15 to 20 years ². Gulf Shore points to Florida’s climate and near-constant use ¹.

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Which lifespan figures should you trust?

Use the Florida figures over national averages. We found no government study measuring AC life in Florida; these estimates come from contractors and manufacturers.

Who says	Figure	What it covers
Gulf Shore Cooling, Fort Myers	10 to 15 years ¹	Most Florida units
Badger Bob’s, Sarasota	Roughly 10 years ³	Sarasota, Manatee and Charlotte counties
Carrier	15 to 20 years ²	National average
US Department of Energy	18 years ⁴	A cost-model assumption for hot, humid regions, not a measured Florida life

What shortens AC life near the coast?

Run time, salt air and dirty filters can shorten AC life ¹:

Run time: Fort Myers logs 4,046 cooling degree days in a normal year ⁵. Each counts how far a day’s average temperature was above 65 degrees ⁶; higher totals mean more cooling.
Salt air: Carrier says salt water can travel up to two miles from the coast ⁷. It can corrode copper and aluminum coils, causing refrigerant leaks and system failure ⁷.
Dirty filters: ENERGY STAR says a dirty filter raises energy costs and can cause early failure ⁸.

Cooling degree days in Fort Myers, normal year (National Weather Service)

When should you replace your AC?

Start pricing a replacement when your system is over 10 years old ⁹ and repairs get expensive. Check these signs and costs:

Warning signs: Carrier lists breakdowns, rising bills, uneven cooling and loud noises ².
Age: ENERGY STAR says systems over 10 to 12 years old break down more often ¹⁰.
The 50% rule: Carrier says to upgrade when a repair nears 50% of a new system’s value ².
The $5,000 rule: multiply the system’s age by the repair quote; above $5,000 favors replacement ¹¹. A 12-year-old system with a $500 repair scores $6,000. Treat this as a rule of thumb: CBS News names no originator.

For systems using the older refrigerant R-22, only recycled, reclaimed or previously produced R-22 can be used for service after 2020 ¹². The EPA does not require you to replace an R-22 system ¹².

Is there a new AC tax credit?

The federal 25C home improvement credit does not apply to a system installed in 2026. The IRS says it ended for property placed in service after December 31, 2025 ¹³.

Your new system must also meet a minimum efficiency rating, called SEER2. AHRI lists the Southeast minimum as 14.3 SEER2 for split systems under 45,000 BTU ¹⁴. Ask each company for the rating in writing.

How do you make AC last longer?

Check the filter monthly and book a yearly check-up.

Monthly: inspect, clean or change the filter ⁸.
Yearly: book a pre-season check-up with a contractor ⁸.
Within two miles of the coast: ask about coastal equipment ⁷. Carrier’s coastal units have a five-year parts warranty for seacoast corrosion failure, but not cosmetic corrosion ⁷.

How Long Should My Air Conditioning System Last?, Fox Family Heating and Air Conditioning on YouTube

How do you check an AC contractor?

Look up the license before you sign. Florida DBPR lets anyone verify one by name, license number, city or license type ¹⁵.

CAC: Certified Air Conditioning Contractor ¹⁶, who can work anywhere in Florida ¹⁷.
RA: can work only where registered ¹⁷. It stands for Registered Air Conditioning Contractor ¹⁶.

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