Front A/C sometimes doesn't blow out air but back always does.

Start by checking pressures or bringing it to a shop for them to check the level of refrigerant. The system being low can cause this. You can also have a blend door actuator issue but both would need to be looked at by a shop. Use this link to find a good shop near you. https://repairpal.com/repair-shops Alex

If the case is that it does not blow at all(Not cold or hot),have your front blower system checked.It has a front and a rear blower totally independent.You have a front blower relay,resistor and blower motor.Hope this helps you.