AC Repair vs. Replacement: How to Decide

When your AC breaks down in Miami, the big question is whether to fix it or replace it. Here's how the pros actually make that call.

Start with system age

Most central AC systems last 10–15 years in South Florida — a bit less than the national average because they run so hard. Under 10 years old and the repair is usually worth it. Past 12–15, replacement often makes more sense.

The $5,000 rule

Multiply the repair cost by the system's age. If the number tops $5,000, lean toward replacement. A $600 repair on a 9-year-old unit ($5,400) is borderline; the same repair on a 4-year-old unit ($2,400) is an easy fix.

Factor in efficiency

Today's high-SEER2 systems can cut cooling costs meaningfully versus a 12-year-old unit — real money in a climate where the AC runs most of the year. A new system also restores reliable dehumidification.

Count the repairs

One repair is normal. A third service call in two years is a pattern — you're renting reliability at repair prices. At that point a planned replacement beats another emergency.

Our honest take

We'll always give you the repair option when it's the smart money — never a hard sell. When replacement wins, we show you the payback math and financing options so it's your call.

Frequently asked questions

Is it worth repairing a 10-year-old AC?

Often yes, if the repair is minor and the system has been reliable. Use the $5,000 rule (repair cost × age): under $5,000 favors repair, over favors replacement.

How long do AC units last in Florida?

Typically 10–15 years in South Florida’s climate, since systems run nearly year-round. Annual maintenance extends lifespan.