Leak located at the reversing valve. Unfortunately due to design flaws and installation errors a steel mounting screw of the air handler control board was resting upon the endicap of the reversing valve and over a long period of time causing the system to wear through the brass and blow out all the refrigerant Reversing valve and all refrigerant need replaced Seth has contacted the United technologies local distributor and begun the process of a replacement part repair estimate Seth will follow up with homeowners when parts availability and the repair estimate are prepared