Why Is My AC Running But Not Cooling The House?

An AC that runs but does not cool usually has blocked airflow or a refrigerant problem that stops heat from leaving your home. The next most common causes are thermostat setting errors or a safety switch interrupting the cooling cycle while the fan still runs. A quick technician tell: if the outdoor fan spins but the larger copper line isn’t cold, the system isn’t moving heat. We solve this daily for Florida homes, including those in Port Salerno. When basic checks don’t restore cooling, Del-Air offers same-day appointments and 24/7 emergency AC repair.

Try these simple checks before you call:

• Replace a dirty air filter and open closed supply vents.
• Set the thermostat to Cool and Auto (not On) and lower the setpoint.
• Clear leaves from the outdoor unit; ensure at least 2 feet of clearance.
• Check for ice on refrigerant lines or water near the air handler; if present, turn the system off.

If you see ice, frequent breaker trips, or no temperature drop, power the system off and schedule a professional diagnostic.

Updated: 2026-09-18

Need help in Port Salerno, FL? Call (772) 567-3100 or book online.