Factor 1: what actually failed
Not all failures are equal. A capacitor, a contactor, a fan motor, or a float switch are routine wear items — worth repairing on almost any system that is otherwise sound, including a fifteen-year-old one.
A failed compressor or a leaking evaporator coil is a different conversation. Those are the two most expensive components in the system, and on an older unit the repair can approach half the cost of replacing everything.
Factor 2: the refrigerant it uses
If your system runs R-22, that matters. U.S. production and import of R-22 ended in 2020, so the only supply left is recovered or previously stockpiled. Every leak repair and recharge on an R-22 system gets more expensive over time, and there is no path back.
An R-22 system with a refrigerant leak is usually a replacement candidate regardless of how well it otherwise runs. An R-410A system with the same leak is often worth fixing.
Factor 3: age against realistic Florida lifespan
Most central systems in Northeast Florida give about 10 to 15 years. Our climate runs equipment far more hours per year than most of the country, and coastal salt air shortens outdoor unit life further.
Under 8 years, repair is usually right. Over 15, a major repair rarely pays for itself. Between those, the other three factors decide it.
Factor 4: how the system has been treating you
This is the factor people undercount. If the house has never been comfortable, if some rooms never match the thermostat, if it has always been humid, replacing a failed part returns you to a system you did not like.
That is also the moment to find out whether the problem is the equipment or the ductwork. New equipment on leaking, undersized duct underperforms from the first day, and that disappointment gets blamed on the equipment.
A simple rule that works most of the time
If the repair costs more than about a third of replacement, and the system is past ten years, replacement usually wins on total cost over the next five years.
What you should expect from any contractor is the arithmetic for both paths in writing, not a verdict. If a repair buys you five more seasons, you deserve to hear that even when the replacement sale is larger.
Want it measured instead of guessed?
The readings that settle this — pressures, superheat and subcooling, amp draw, static pressure — take a visit. You get the price in writing before anything is replaced.
(904) 467-1100