AC shuts but fan keeps running
Have you checked to make sure you don't have a hole in your ductwork that is pulling moist air into your home?  If you A/C is a &quot;package unit&quot; especially, you must determine the integrity of the ductwork, especially the large diameter hoses that connect the unit to the house.  If there's a breach, you could be pulling in too much humid air from outside which can cause the evaporator coils to freeze up.  Many units sense that the coils are still cold and will automatically run the fan until the temperature comes up.  In this case, the evaporator fan will tend to cycle on and off or simply run continuously in an attempt to disperse the cold air.