Upon arrival customer told me the heat was not working and the system is only 3 weeks old. The company that installed the unit put a T6 in and customer did not like it and ac company would not come back and fix it or install what the customer liked. Customer went out and bought a 9000 and installed it himself. He had the reversing valve energizing in cool and Rheem unit like it to be energized in heat. I programmed the thermostat for the customer and restored heat to home