An AC that runs but isn’t cooling usually means restricted airflow or a refrigerant or control issue rather than a total system failure. The most common culprit is a clogged air filter that chokes airflow and lets coils get too cold to move heat. A mis-set thermostat, a blocked outdoor condenser, or low refrigerant from a leak can also drop cooling performance. A quick technician check is measuring temperature drop between a return grille and a nearby supply; a poor delta hints at airflow or charge problems. Our technicians see this often in Georgetown homes as heat and dust build early in the season.
Before you call, check these quick items:
- Replace a dirty filter and open all supply/return vents.
- Set thermostat to Cool and Auto, and verify the setpoint is several degrees below room temp.
- Clear debris from the outdoor unit and gently rinse the coil fins from the outside.
- If you see ice on lines, hear hissing, or smell burning, turn the system off and schedule service.
If these steps don’t restore cooling after about an hour of steady run time, book a professional diagnostic to prevent larger damage.
Updated: 2026-06-26
Need help in Georgetown, TX? Call (512) 588-5937 or book online.