Air conditioner repair near Mt. Vernon, Ilinois?

That sounds like the bearings in the fan motor seized. Mine did it on a hot summer night back in 2012. I checked and found that it would not turn. Found a replacement about 30 miles away and changed it myself. It took about an hour from start to finish after I had purchased the replacement motor. I think the motor was under 150.00.
If you are a little handy with tools this is a do it yourself job.