Why is my AC running but not cooling?
An AC that runs without cooling is most often a dirty filter choking airflow, a failed capacitor, or low refrigerant from a leak. The filter you can fix in two minutes; a frozen coil means shut it off and let it thaw before a tech comes, or the real problem can't be diagnosed.
Likely causes
- Clogged filter — Starved airflow freezes the coil and kills cooling — check this first, always.
- Failed capacitor — The outdoor fan or compressor won't start properly; a common, relatively cheap repair.
- Refrigerant leak — Ice on the refrigerant lines plus weak cooling. Refilling without fixing the leak buys weeks, not years.
- Dirty outdoor condenser — Cottonwood, grass, and debris insulate the coil so heat can't escape.
What you can check yourself
- Replace the filter. If the indoor coil is iced, turn the system off (fan on) for 3–4 hours to thaw.
- Clear debris from around the outdoor unit — 2 feet of clearance on all sides.
- Check that the thermostat is on 'cool' and below room temperature (it happens more than anyone admits).
Typical cost
Typical repairs in Charlotte, NC: capacitor $150–$350; refrigerant leak repair + refill $450–$1,200; fan motor $300–$600.
When to call a pro
Ice keeps returning, the breaker trips, or it blows warm after a filter change and thaw — those need a tech, and running it meanwhile can kill the compressor.
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.