I checked to see if its defrosting and frost is still forming .
Frost is forming on the coils so you know the unit is working.
Check that the frost is even across the coils.
If it is very patchy or just is one area (usually where the freon enters the coils), it is an indication of a low freon condition.
Also how long have you waited give it at least 4 hours.
The evaporator fan is blowing but not very hard.
This could be your problem.
The fan may need replacing.