Why does my AC run all day but never cool the house?

An AC that runs constantly without reaching setpoint usually has low refrigerant from a leak, a dirty condenser or evaporator coil, a clogged filter strangling airflow, leaky ductwork dumping cooled air into the attic, an aging compressor, or was undersized from day one.

Diagnose Fast — Continuous Running Is Expensive

Check the filter first, then coils, refrigerant charge, and duct integrity. Nonstop running punishes both your electric bill and the compressor, so professional diagnosis quickly beats letting it grind through the season toward a mid-heat-wave failure.

Why Northwest Suburbs Homeowners Choose All Set

All Set HVAC is the Northwest Suburbs’ local indoor air quality expert — home of the $99 Air Score Test. From air quality testing and purification to HVAC maintenance plans and new system installations, our licensed Arlington Heights technicians find the cause, fix it right, and back it with the All Set Guarantee. Call (847) 807-6100 or schedule your Air Score Test today.