Fahrenheit AC Blog

A homeowner checking an air vent while his central AC is not cooling.

Maintenance · Updated September 25, 2026

Why Is My Central AC Running but Not Cooling?

Your air conditioner is running, but your home still feels warm. If you have an AC running but not cooling, the problem may be more than a thermostat setting. Restricted airflow, a dirty filter, low refrigerant, a frozen evaporator coil, or a problem with the outdoor unit can all reduce cooling performance.

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