AC Repair vs Replace: How to Decide
How to decide whether to fix the AC one more time or replace it. Hill Country considerations, refrigerant rules, and the math.
Quick answer
Replace when the unit is 12+ years old, uses R-22 refrigerant, has had two or more major repairs in the last 3 years, or when the repair cost exceeds half the replacement cost. Repair when the unit is under 10 years old, the failed component is a single isolated part (capacitor, contactor, fan motor), and the rest of the system is sound. The 10-12 year window is the judgment-call zone.
The four major factors
1. Age
Modern AC units in Hill Country climate typically last 12-15 years before becoming uneconomical to repair. Texas heat is harder on outdoor condensers than northern climates, so the upper end of that range applies to systems that have been regularly maintained. A 15-year-old unit with a major failure is almost always a replace; a 5-year-old unit with the same failure is almost always a repair.
2. Refrigerant type
R-22 was the standard refrigerant for AC systems through the mid-2000s, then phased out globally. Production stopped completely in 2020. Any remaining R-22 supply is from recycled stock and expensive — a single recharge on an R-22 system can cost $400-800 depending on amount needed. If your AC uses R-22 and has any refrigerant-related issue, replacement almost always wins economically. Check the data plate on the outdoor unit to identify refrigerant type.
3. Repair history
One major repair on an aging unit is sometimes worth doing. Two or three in a 3-year span are warning signs — the rest of the system is degrading and you're chasing failures. Total your repair spend over the last 3 years; if it's approaching half the cost of a new system, you've already paid for replacement without getting the benefits of new equipment.
4. Current repair cost
The 50% rule: if the immediate repair cost exceeds 50% of replacement cost, replace instead. For Texas, replacement of a typical 3-ton split system runs $5,500-$9,000 installed depending on SEER rating and any modifications needed. A repair quote of $2,500-$4,500 on an aging unit usually crosses into the replace decision.
Hill Country considerations
Two factors make the Hill Country replacement math slightly different from other climates. Heat load: New Braunfels AC systems run more total hours per year than systems in milder climates. Higher SEER ratings pay back faster here — the difference between SEER 14 and SEER 18 might be 3-4 years of payback in the Hill Country vs 7-8 years in northern climates. Humidity: Variable-speed systems dehumidify significantly better than single-stage systems. If indoor humidity has been climbing as your old system ages, a variable-speed replacement will solve that as a side effect.
When to call for an estimate
Anytime you're facing a major repair on a 10+ year old unit, get both a repair quote and a replacement quote before deciding. A reputable installer will give both honestly — the right answer is sometimes 'repair this time and plan replacement for next spring,' sometimes 'replace now while the system can be removed cleanly without ductwork damage.' AC installation includes free Manual J load calculations and SEER-rating analysis as part of the quote.
Need an estimate? (830) 555-0142. Free on-site quotes for repair vs replace decisions.