Why Is My AC Running But Not Blowing Cold Air?

Your AC can run without cooling if the thermostat is mis-set, the filter is clogged, refrigerant is low from a leak, ducts are leaking, or indoor units are dirty. Electrical or blower issues can also stop cold air. Endless Energy repairs ACs and heat pumps, including refrigerant checks, thermostat and electrical diagnostics, and duct sealing/cleaning. We offer same-day emergency service in areas like Weston and Newton.

Quick checks:

• Set thermostat to Cool and 5°F below room temp.
• Replace the filter.
• Open supply vents and check airflow.
• If you see ice on lines, turn the system off and call.

Updated: 2025-12-22

Need help in Weston, MA? Call (508) 501-9990 or book online.

"Excellent and prompt service." — Jason N.