Why Is My AC Running But Not Cooling The House?

An AC that runs but won’t cool usually means an airflow restriction, low refrigerant, or a control fault, not total failure. Most often, a clogged filter starves airflow and lets the indoor coil ice up. Refrigerant leaks and bad capacitors are typical repairs; a weak compressor can make replacement the smarter call after a quote. We diagnose first, explain clearly, price upfront, and stock common parts to complete many fixes in one visit. We bring same-day help to the Worcester area when cooling drops off.

Quick things to check before a service call:

• Thermostat set to Cool and 5°F below room.
• Air filter clean and properly seated.
• Ice on lines or water at the air handler; if so, turn AC off.

If warm air continues, shut it down and schedule a professional diagnostic.

Updated: 2026-10-28

Need help in Worcester, MA? Call (508) 571-6488 or book online. "G & C Plumbing and HVAC did an outstanding spring service on my AC system." — William B.