Sooner or later, it happens to every homeowner: the repair is bigger than expected, and the system isn't young anymore. Do you fix it, or put that money toward a new one? There isn't one right answer for every home, but a few clear factors make the decision a lot easier. Here's how we think about it for homes in Kissimmee and across Central Florida.
How long air conditioners last in Florida
A central air conditioner in Florida typically lasts about 10 to 15 years, often toward the lower end of that range. Our systems run almost all year in heat and humidity, and homes closer to the coast deal with salt air as well. Heat pumps, which handle both cooling and heating here, have a similar lifespan. You can read more in our FAQ on AC life expectancy.
Age alone isn't a reason to replace a system that's working well. But it changes the math when a major repair comes up.
A quick rule of thumb: the 5,000 rule
Multiply the age of the system in years by the cost of the repair. If the result is more than 5,000, replacement is usually worth a serious look. For example, a $500 repair on a 12-year-old system comes to 6,000. If the result is well under 5,000, repairing usually makes sense.
It's only a starting point. The rule doesn't know how often the system has broken down, how comfortable your home is, how high your power bills have gotten or what refrigerant the system uses. Those matter just as much.
When repair usually makes sense
- The system is relatively young and has been reliable
- The problem is a common part, like a capacitor, contactor, fan motor or a clogged drain
- The house stays comfortable and your power bills have been steady
- The part is still covered by a manufacturer's warranty (check your paperwork and whether the equipment was registered)
When replacement deserves a look
- Repeated breakdowns. One repair after another adds up, especially when each one leaves you wondering what will fail next.
- A major part has failed on an older system. A failed compressor or a leaking coil on a system near the end of its life is often the point where replacement makes more sense than repair.
- It uses R-22. Systems installed before about 2010 often use R-22 refrigerant, sometimes called Freon. U.S. production and import of R-22 ended in 2020, so refrigerant repairs depend on a limited recycled supply, which can make leak repairs costly.
- Power bills keep climbing. As systems age and wear, they can run longer to do the same job.
- Comfort and humidity problems. If some rooms never cool down, or the house feels sticky even when the AC runs, the system may be worn out or the wrong size for the home.
What's different about new systems
If it's been 12 or 15 years since you last bought an air conditioner, a few things have changed:
- Efficiency minimums are higher. Since 2023, new split-system central air conditioners installed in Florida and the rest of the Southeast must be at least 14.3 SEER2 under 45,000 BTU/h, or 13.8 SEER2 at 45,000 BTU/h and up. Our article on SEER2 and your Florida power bill explains what that means.
- Refrigerants have changed. Under federal rules that took effect in 2025, new residential systems are moving to newer refrigerants with lower global warming potential, such as R-454B and R-32. R-410A is still used to service existing systems.
- Matched systems matter. The indoor and outdoor units are designed and rated to work as a pair. Replacing only half of an old system can limit efficiency and reliability, and older indoor coils may not be compatible with newer refrigerants, so a complete matched system is usually the better choice.
- Better humidity control is available. Two-stage and variable-speed systems can run longer at lower speeds, which helps pull more moisture out of Florida air.
Questions to ask before you decide
- What exactly failed, and why? Is it likely to happen again?
- How old is the system, and what refrigerant does it use?
- Is any part still under warranty?
- Are other parts showing wear that will need attention soon?
- If I replace it, what size does my home actually need, and are the ducts in good shape?
A good contractor will answer these plainly and let you decide. Be cautious of anyone who pushes replacement without showing you what's wrong, or who sizes a new system on square footage alone.
How we help you decide
We test before we guess. When we find a problem, we explain what failed, what the repair costs and whether we think repair or replacement makes more sense, with no upselling. If repair is the smart call, we'll fix it. Learn more about our AC repair. If replacement is, we'll look at your home, recommend the right size and give you a clear written price. See AC installation and replacement.
If you decide to repair and keep your system going a few more years, regular maintenance is the best way to protect it. Our Comfort Club plans include two tune-ups a year, and members get money off a complete system replacement when the time does come.
