Why Is My AC Running But Not Blowing Cold Air?

If your AC runs but the air isn’t cold, likely causes include a dirty filter, low refrigerant, a frozen coil, or incorrect thermostat settings. A tripped outdoor breaker or a failed outdoor fan can also stop cooling.

Quick checks:

• Set thermostat to Cool and lower 5°F.
• Replace a dirty filter.
• Verify the outdoor unit is running and the breaker is on.
• If you see ice, set system to Off and Fan On.

We offer same-day AC repairs in San Antonio. Residential service fee is $79. Repairs are backed by a 1-year warranty.

Updated: 2025-11-25

Need help in Helotes, TX? Call (210) 412-2075 or book online.