I bought new construction home approximately 3 years ago with two Trane units installed, a 2 Ton and a 2.5 Ton. By Carolina Comfort Air, NC. The 2.5 ton was having issues cooling and Carolina Comfort Air was called out. The technician discovered that the air handler coil was leaking from two factory braised spots. A new coil and valve was ordered, and installed. Upon installing the new parts it was found that the valve was restricting flow, so a new valve was ordered. Technicians came out again and now technicians say it's the new coil that was sent that is bad, so again I am stuck waiting on new parts. With the initial factory parts being bad and subsequent parts being bad my only problem is the fact that I am liable for paying installation cost of over $1500 for this fairly brand new unit with what I'm being told by techs as bad parts.