You can probably figure out why a working fan in an air conditioning system is important. If there’s no fan, how will the cool air move through the vents to the rooms?
But there’s even more to it than that. There are two vital fans in an air conditioning system. The indoor fan is the one that distributes cool air through the house, and it also sends the air across the evaporator coil to cool it down in the first place. The outdoor fan is responsible for moving air over the condenser coil to release heat and then exhaust it outside. If either one isn’t working right, you won’t get cooling in your house.