A\C only blows hot air
If it is blowing heated air and not just outside air then one or more of the Blend Doors are not working, possibly a bad servo motor, worse case is a door is broken and that will get expensive.
Most likely the above. Also, is the compressor turning(clutch on front spins). Out of refridge? Pressure cut-off switch defective? bad relay? Is one AC hose cool, and one hotter?