Quick answer
- Under ~10 years old with a moderate repair: repair, almost always.
- Past ~12–15 years with a major component failure (compressor, heat exchanger): replacement usually wins.
- Systems on phased-out R-22 refrigerant are almost never worth major repairs.
- Chronically uncomfortable rooms or runaway bills tilt the math toward replacement even before a failure.
Start with age and the failed part
Equipment age is the anchor. Air conditioners and heat pumps typically serve 12–15 years here (inland heat is tough on them); gas furnaces often reach 15–20. Then weigh what failed: a capacitor or blower motor is routine at any age, but a compressor or heat exchanger failure on an old system is the classic replacement trigger — you'd be putting the most expensive part into the machine most likely to fail somewhere else next.
The refrigerant question
If your AC or heat pump still runs on R-22 (systems generally installed before 2010), its refrigerant has been phased out of production under federal law and is scarce and expensive. Any repair that involves opening the refrigerant circuit on an R-22 system is usually money better spent on replacement.
Newer systems are also transitioning refrigerants (to lower-global-warming-potential blends like R-454B) — one more reason to have a technician confirm exactly what your system uses before authorizing a big repair.
Factor in the quiet costs
- Efficiency gap: a 15-year-old system can use dramatically more electricity than a new Southwest-region-minimum unit for the same cooling.
- Comfort debt: rooms that never cool, humidity that never settles, noise you've learned to live with — replacement fixes what repairs can't.
- Repair cadence: two or more significant repairs in two years is a trend, not bad luck.
- Warranty reset: replacement restarts a 10-year parts warranty and, with a maintenance plan, keeps it enforceable.
How to decide without pressure
- Get the failed part diagnosed precisely — “it needs a new system” without a diagnosis is a red flag anywhere.
- Ask for both numbers: the honest repair quote and the replacement quote, side by side.
- Ask how each option performs against your actual complaint (bills, hot rooms, noise) — not just the breakdown.
- Sleep on it. A company comfortable with you taking a day to decide is a company quoting honestly.
Estimates for replacement are free and carry no obligation — that's the pressure-free part of how we work, and it's exactly the situation the free estimate exists for.
When you're ready