A/C works on and off

Kind of an odd deal. If the fan blows but you get no air flow (anywhere...lilke, no dash, no floor...), I have seen it where the air conditioning runs continually to the point of icing up the evaporator core...this restricts air flow. Usually this is caused by a faulty cycle switch or high pressure cut off switch. Just one idea...have it checked locally for confirmation. Good luck! Some shops near you...: http://repairpal.com/ford-repair-in-lake-worth-florida