We have been living in our new “cookie cutter, development” home for a year and a half. We paid extra for a “high efficiency” heater/air conditioner. Ever since the beginning of last summer I have complained about the efficiency of the a/c – on days over 90 it has a hard time maintaining 76 degrees. So far they have found a kinked vapor line, refrigerant leaks, and disconnected and unsecured ductwork. All have been repaired, but just this week I learned that our model of home is supposed to get a 3.5 ton a/c unit, and I have only a 3 ton. The builder has agreed a replacement is warranted, but as you can imagine I don't thrust the builder's contractor further than I can spit – they have lied to me before. The current condenser is a Lennox 13ACC-036, the coil model # is CX34-44/48C-6F. Will this coil match a 3.5 ton condenser? What should I expect when they swap out the condenser? Is there anything I can watch for to make sure they are doing the job correctly?