AC Running But Not Cooling? What West Texas Homeowners Should Check First

If your AC is running but blowing warm air, the most common West-Texas causes are a clogged filter, a frozen coil, a tripped breaker on the outdoor unit, or low refrigerant from a leak — and you can safely rule out the first three in a few minutes before you call. Work the checklist in order; if warm air remains after the basics, it's a tech's job.

Check these first, in order

1. Thermostat. Confirm it's set to COOL, a few degrees below room temperature, and the fan is on Auto. Replace dim/blank batteries.
2. Air filter. A badly clogged filter is the #1 cause of weak, warm air and a frozen coil. Swap it.
3. Both breakers. The indoor air handler and the outdoor unit often have separate breakers — if the indoor fan runs but the outdoor unit is dead, check its breaker and reset once.
4. Outdoor unit. Make sure the condenser is actually running and clear of weeds, dust, and debris (power off before touching).
5. Ice on the coil or lines. If you see frost, switch the system to FAN only and let it fully thaw — running it frozen makes it worse.
6. Vents and returns. Open every supply vent and clear furniture off the return.

When it's time to call

If the air is still warm after a fresh filter, a reset, and a thaw, the likely culprits are low refrigerant (a leak), a failed capacitor, or a failing compressor — all licensed-tech work. In 100°+ heat with the house climbing, treat it as a priority repair.

Where it goes wrong

• Running a frozen system to "force" cooling — it deepens the freeze.
• Topping off refrigerant with a DIY can — low charge means a leak that needs repair.
• Only checking the indoor breaker and missing the dead outdoor unit.

What should I do next?

• See the full symptom list → read 9 Signs Your AC Needs Service.
• Runs nonstop and still warm → see Why Is My AC Running Constantly?.
• Still warm → call (432) 580-6342 or book priority repair.