What could be wrong with air conditiioner that won't blow air the power comes on and you can hear it running?

Well, every air conditioner has at least two motors, the compressor and the fan motor. So it is probably likely that your compressor is working but the fan motor is malfunctioning. Try removing the cover of the unit and if you notice that one of the fan blades the very hard to rotate then that means the fan motor should be replaced. If the fan blades turns easily for you then it will probably needed some electrical work. In your case, it would be best to have a qualified technician help you out! Good luck and keep cool!

Most window units only have one motor with a double shaft.