Why Is My AC Running But Not Cooling Properly?

Your AC can run but not cool due to weak airflow or low refrigerant. Common causes include a clogged filter, dirty condenser or evaporator coils, a refrigerant leak, frozen coils, thermostat missettings, blocked vents, or ductwork issues. In Glendale Heights and nearby areas, we diagnose these issues and provide upfront repair options.

Quick checks:

• Replace the air filter.
• Set thermostat to Cool and lower the setpoint.
• Clear debris around the outdoor unit.
• Open supply/return vents. If you see ice, turn AC off and set fan On.

Updated: 2025-12-24

Need help in St. Charles, IL? Call (331) 294-8710 or book online.

"He diagnosed the problem quickly, explained everything in simple terms, and had my heat running perfectly again in no time." — Bradley W.