Why Is My AC Not Cooling?

The short list is a dirty filter, a frozen evaporator coil, a failed capacitor, a clogged drain line that has tripped the float switch, or low refrigerant. Check the filter first, since a blocked one starves airflow and costs nothing to rule out. If the indoor coil or the copper line is iced over, the system has to thaw before anyone can diagnose it properly. An outdoor fan that hums without spinning points at the capacitor. An air handler that is dead while the thermostat still has power usually means a full drain pan and a tripped safety switch, which is common in this humidity. Admiral Heating and Cooling of Naples answers 24 hours a day at (239) 200-1834.