My a/c unit runs but, no air coming through vents the temp in house stays the same. I looked at it on the roof and water is heavily dripping from it. The unit is off now

Is the indoor fan working?

I think so. It is running outside nothing blowing through vents when I turned it off It made a swish noise

Is this going to be an expensive repair?

If you can get the part and replace it yourself,, maybe 30 bucks

OK Thank You for your help. I appreciate it :)