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 Dallas–Fort Worth, TX: 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 Dallas–Fort Worth, TX
- Strike Force Heating & Air LLC · 3004 Fairmount St, Dallas, TX · 2145704966
- Dallas HVAC Repair Service · 325 North St. Paul Street Ste 5200, Dallas, TX · +19453038465
- Christian Mechanical · 1910 Pacific Ave Ste 7062, Dallas, TX · 4696340741
- Alpha Heating & Cooling Llc. Hvac Dallas · 1910 Pacific Ave Ste 12065, Dallas, TX · 12149458799
- airductcleanerdallastx · 1903 Young St, Dallas, TX · 9727299139
- Sanchez Brothers HVAC · Dallas Fort Worth Int'l Airport, 2400 Aviation Dr, Dallas, TX · +19407583617
- airduct--cleaning · 2305 N Central Expy, Dallas, TX · 2144715592
- E3solutions · 2828 Lemmon Ave Apt 5163, Dallas, TX · (479) 365-9333
Get free quotes from Dallas–Fort Worth, TX 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.