Is it worth repairing a 15-year-old AC unit or replacing it?
Use the $5,000 rule: multiply the unit's age by the repair quote — if the product is over $5,000, replacement usually wins. At 15 years, a repair over ~$350 fails the test. Also decisive: if your unit uses R-22 refrigerant (phased out), any refrigerant repair is money into a dying system — replace.
Likely causes
- Refrigerant type — R-22 systems (pre-2010) face scarce, expensive refrigerant — the strongest replace signal.
- Compressor condition — A failed compressor on a 15-year-old unit is almost never worth replacing alone.
- Repair history — Two or more repairs in the last two summers means the system is telling you something.
What you can check yourself
- Do the $5,000 math with the actual quote before deciding.
- Ask what the repair buys you: a $300 capacitor fix is different from a $1,800 coil.
- Get the replacement quote while the tech is there — it's free information either way.
Typical cost
Common repairs run $150–$600 (capacitor, fan motor) up to $1,500–$2,500 (coil). Full system replacement in Charlotte, NC typically runs $6,500–$12,000 installed.
When to call a pro
If the unit is 15+, uses R-22, or the quote tops $1,000, get a second opinion before approving — this is the highest-pressure sales moment in home services.
HVAC pros in Charlotte, NC
- Winston Comfort Systems · 360 S Graham St, Charlotte, NC · +17049989848
- Service Logic · 650 S Tryon St Ste 1000, Charlotte, NC · 9802961700
- Charlotte · 1530 Elizabeth Ave, Charlotte, NC · 19803019528
- Yandle-Witherspoon Supply · 1001 N Brevard St, Charlotte, NC · +17043424389
- Lindsay Heating & Air Conditioning · 2339 Lucena St, Charlotte, NC · 17043471847
- Assured Quality Llc · 3637 N Graham St, Charlotte, NC · 17044921165
- Advanced Mechanical · 3800 Woodpark Blvd, Charlotte, NC · +17042388756
- Dealers Supply Co. · 3731 Woodpark Blvd n, Charlotte, NC · +17044059900
Get free quotes from Charlotte, NC pros →
Data by Servik — verified local pros from official license records and public sources. Cost figures are typical ranges, not quotes; a pro's written estimate is the real number.