It is not a good idea to keep the fan in the on position, in this position when the cooling is satisfied the continuous fan blows the remaining moisture left on the coil back into the space increasing the humidity in the space, It should be set in the auto position on the thermostat especially when hot and humid outside. The supply registers in each room should be left open like they were when installed. When I was doing HVAC inspections and a customer complained about a space not cooling or heating correct it was usually because someone shut off the supply register, keep them open as they were designed. If there is no air flow coming out you may have a problem with a damper motor or the duct came disconnected in the attic space. The units are sized correct especially the village homes, the size is considered to remove the humidity by its run time, a larger unit won't remove the humidity but cool the space faster causing cool but clammy air. Some homes have return grilles on the wall make sure they are not being blocked by furniture etc. Outside, make sure the condenser is free for air flow about 2 feet all around it. Most important are the air filters put the correct size in the unit and should be rated MERVE 8 or greater.
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