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When Should You Replace Your AC? 7 Signs It's Time

February 28, 2026

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Deciding whether to repair or replace your AC system is one of the biggest home maintenance decisions you'll face. Here are seven signs that it might be time for a new system.

1. Your System Is Over 15 Years Old — The average lifespan of an AC unit in South Florida is 10-15 years. If your system is approaching or past this age, it's likely becoming less efficient and more prone to breakdowns.

2. Repair Costs Are Adding Up — A good rule of thumb: if a repair costs more than 50% of the price of a new system, replacement is usually the smarter investment.

3. Your Energy Bills Keep Rising — If your energy bills are climbing despite no changes in usage, your aging AC system may be losing efficiency. Modern systems can be 30-50% more efficient than units from 10-15 years ago.

4. Your System Uses R-22 Refrigerant — R-22 (Freon) has been phased out due to environmental regulations. If your system uses it, replacement is inevitable — and the sooner you switch, the sooner you start saving.

5. Uneven Cooling Throughout Your Home — If some rooms are too cold while others are too warm, your system may no longer be capable of properly conditioning your space.

6. Excessive Humidity Inside — Your AC should moderate humidity as well as temperature. If your home feels muggy even with the AC running, the system may need replacement.

7. Frequent Breakdowns — If you're calling for repairs more than twice a year, it's a sign that your system is nearing the end of its useful life. A new system will give you reliability and peace of mind.