Why is your air conditioner blowing air but not cold?

If the air conditioner is not new it could have stopped blowing cold air because of several different things, too many to list here. Here are couple of possible reasons: all the refrigerant gas has leaked away; a pump has stopped working; someone else turned the temperature control to a higher temperature...?

The best advice anyone can give you is to call a licensed Heating, Ventilation and Air Conditioning (HVAC) technician to fix it for you.