Repair when a single component has failed on a system with life left. Replace when repairs stop making economic sense, when the refrigerant is obsolete, or when the system can no longer hold humidity. The dividing line is usually age plus the cost of the specific repair.
Signs Pointing to a Repair
These indicate a failed part rather than a finished system.
The outdoor unit hums but the fan will not turn. Almost always a capacitor — inexpensive, and it destroys the motor if left running.
The system quit with no warning. Check the breaker, the filter, and the condensate pan. Many sudden failures are a tripped breaker, a frozen coil from a clogged filter, or a float switch shutting the unit off because the drain clogged.
Ice on the refrigerant lines. Restricted airflow or low charge. Shut it off and let it thaw rather than running it.
A single failure on a system under ten years old. Capacitors, contactors, and fan motors are normal wear items, not end-of-life indicators.
Signs Pointing to Replacement
The repair math no longer works. Multiply the repair cost by the system’s age in years. If the result exceeds the price of a new system, replacement is usually the better decision.
Obsolete refrigerant. R-22 production has ended, and only reclaimed stock remains. A leak on an R-22 system frequently becomes a replacement decision, because recharging costs a meaningful fraction of a new system and the leak will recur.
Repairs arriving in sequence. A third failure in two years on different components is a pattern — parts of the same age wear out at similar rates.
Compressor failure on an out-of-warranty unit past twelve years.
The Humidity Signal
Most people watch temperature. In a Texas summer, humidity tells you more about where a system stands.
Roughly a third of what an air conditioner accomplishes on a humid day is moisture removal. A system that reaches the setpoint but leaves the house feeling clammy has lost the ability to run long enough to dehumidify.
Households respond by lowering the thermostat, which costs more and does not address the problem. That is a capacity failure even when the temperature reads correctly.
Rising Bills and Longer Runs
Compare this summer’s electric bills to the same months two and three years ago, adjusting for rate changes.
A steady climb with no change in habits means the system is working harder for the same result. Efficiency decline is gradual enough that households acclimate, which is why the bill is often the only evidence before something breaks.
What Is Not a Reason to Replace
Being honest about this matters as much as the rest.
Rooms that have always been uncomfortable are a ductwork or insulation problem, not a capacity problem. A new system will not fix them, and any contractor who says otherwise is not diagnosing. Duct sealing is the repair that addresses it, at a fraction of a replacement.
We would rather do a modest repair on a system with years left than sell equipment you do not need.
Age in Local Context
Ten to fifteen years is the standard range, but that assumes a temperate climate.
In the Hill Country, where cooling season runs roughly seven months and systems run eighteen hours a day through summer, the realistic expectation sits toward the lower end unless the system has been maintained. A well-maintained system reaching fifteen is common; a neglected one failing at nine is equally common.
How We Decide With You
We measure refrigerant charge, capacitor values under load, amp draw, temperature split, and static pressure — then quote both paths with reasoning attached.
Details are on our AC repair and AC replacements pages. Financing is available, and annual AC maintenance is what keeps most systems in the first category.
Contact 72 Degrees or call (830) 468-5316.
