Why Is My AC Running But Not Cooling Properly?

Your AC can run without cooling if airflow is restricted or the refrigerant circuit has a problem. Likely causes include a clogged filter, dirty or frozen evaporator coil, low refrigerant, a blocked outdoor condenser, incorrect thermostat settings, or an air handler fault. We repair refrigerant leaks, evaporator coils, and air handlers, and offer 24-hour emergency service in Madison and Sun Prairie.

Quick checks:

• Set thermostat to Cool and 3°F lower.
• Replace or rinse the filter.
• Clear debris 2–3 ft around the outdoor unit.
• Check breakers and open all supply vents.

<br/> Updated: 2025-12-23 00:00:00 <br/>

Need help in Fitchburg, WI? Call (608) 291-6473 or book online.