AC component freezing? My AC unit at my house is simply 2 years old...

My AC unit at my house is simply 2 years old and I don't run it constatly however today I did own the air on and after awhile the follower was blowing but no cool nouns. The pipes looked to have froze over. We shut it past its sell-by date and it run again but doesn't anyone know what is wrong? It is still under warranty but this weekend it is suppose to be hot and humid and I would resembling to have AC.
Answers:    You call for to wash your evaporator coils verbs filter ,if it is not the cause next you may have lover problem or you are setting thermostat to to very lo point,if non of the above later maby lo freon or chocked freon circuit
Freezing piping on your AC outdoor unit / compressor could be an indication of gas blockage. If in that is only disciple blowing from your indoor unit, check to see if your compressor is running or not by audible range the sound or look at the enthusiast. If the compressor is quite and supporter stop, get a service guy.