The average central air conditioning system has a lifespan of 15–20 years under ideal conditions — but in Florence's demanding climate, where systems run nearly year-round, many units begin declining in efficiency and reliability well before the 15-year mark. If your system is approaching or past a decade old, it's time to start planning for replacement rather than waiting for a breakdown. Older systems also use R-22 refrigerant, which is no longer manufactured and extremely expensive to service.

If your AC runs constantly but your home stays stuffy and warm — especially during the peak afternoon heat — the system has lost the capacity to meet your home's cooling demand. This can be caused by a failing compressor, low refrigerant, severely degraded components, or a system that was simply undersized for the home to begin with. Constant running without results dramatically accelerates wear on remaining components.

A sudden or gradual rise in your summer electric bills — without a corresponding change in usage habits or utility rates — is a strong indicator that your AC is working harder than it should to produce the same amount of cooling. As components wear out and efficiency degrades, the system draws more electricity for diminishing results. Comparing this summer's bills to the same months two or three years ago can reveal a troubling trend.

A helpful rule of thumb in HVAC: if a repair costs more than 50% of the system's current value, replacement is almost always the smarter financial decision. A compressor replacement on a 12-year-old system, for example, can cost $1,500–$2,500 — and still leaves you with a 12-year-old system with other aging components. That money is better applied toward a new, warranted system that will run efficiently for the next 15+ years.

One repair in several years is normal. Two or more repairs in a single season — or a pattern of annual breakdowns — signals that the system is in general decline and will continue to fail in new ways. Each repair buys a little more time but doesn't address the underlying reality: the system is wearing out. The cumulative cost of repeated repairs often exceeds what a replacement would have cost, with none of the reliability benefits.

Warm air blowing from your vents when the AC is running points to a failing compressor, low or leaking refrigerant, or a refrigerant line issue. Weak airflow — where you can barely feel air coming from the registers — typically indicates a failing blower motor, collapsed ductwork, or a compressor that's no longer generating adequate pressure. Both conditions significantly compromise your home's comfort and often indicate a system nearing the end of its life.

A healthy AC runs with a consistent, relatively quiet hum. Grinding sounds often indicate failing motor bearings. Banging or clanking suggests a loose or broken component inside the compressor or air handler. Squealing points to a worn belt or failing motor. Any of these sounds warrants an immediate service call — operating a system with these noises can cause rapid escalation to more serious and expensive damage, or total system failure.

Some condensation around your indoor unit is normal. But pooling water, ice forming on the refrigerant lines or evaporator coil, or an oily residue near the outdoor unit are signs of refrigerant leaks, drainage problems, or a failing component. High indoor humidity despite a running AC — where your home feels damp and clammy — suggests the system has lost the ability to properly dehumidify the air, which is as important as cooling in Florence's climate.

Some rooms are comfortable while others feel like ovens? Uneven cooling can indicate failing components, ductwork problems, or a system that's lost the capacity to distribute conditioned air properly. While ductwork issues can sometimes be addressed independently, uneven cooling in a system that's 10+ years old is often a symptom of an overall system in decline — particularly the blower motor or compressor losing output pressure.

R-22 (Freon) was phased out of production in 2020 due to its environmental impact. Any system manufactured before approximately 2010 likely uses R-22. If your system develops a refrigerant leak, recharging it with R-22 is extraordinarily expensive — when it can even be sourced at all. A system requiring R-22 is a system that should be replaced, full stop. Modern systems use R-410A or the newer R-454B refrigerant, which are more efficient, more environmentally friendly, and widely available.