Why Is My AC Running But Not Cooling The House?

An AC that runs but is not cooling usually points to airflow, thermostat/control, drain, coil, electrical, or refrigerant issues. The most common cause is restricted airflow from a dirty filter or dirty coils that block heat transfer. Other times, a mis-set thermostat, a clogged condensate drain, or an electrical component fault keeps the system from actually cooling. A unit that short-cycles often leads us to check controls and sensors before we test refrigerant levels. We resolve this problem often for homeowners in the Morgantown area. Our technicians arrive in fully stocked trucks, so most repairs can be completed on the same visit. If you see ice on the lines or water around the indoor unit, turn the system off to thaw and schedule a diagnostic.

Try these quick checks before service:

• Set the thermostat to Cool and at least 5°F below room temperature; fan on Auto.
• Replace a dirty filter and make sure all supply and return vents are open.
• Clear debris around the outdoor unit and note any rapid starts/stops.
• Look for water at the air handler or ice on the refrigerant lines.

Updated: 2026-10-28

Need help in Morgantown, IN? Call 317-830-5862 or book online. "He was punctual and very courteous, and he fixed the problem efficiently." — Stephan A.