I just had a Rheem Seer 14 system installed with a variable speed fan (models RPPB042JAZ and RBHK24J11NFD). I've noted several potential install problems (in descending order of importance):
(1) the variable fan cycles on and off just like my old non-variable system. The unit seems to pass quickly through the low speed and gears up to high speed and remains there until it cycles off. I was led to believe that the unit would run for longer periods, spending most of the time at low speed for better temp & humidity control. The blower unit located in a louvered hallway closet is so loud that I need to turn up the TV when the unit comes on.
(2) the contractor installed what appears to be a relatively cheap plastic pad on top of my old cement pad (for the outside unit) and used plywood to support/level the pad (what happens when the plywood rots away???).
(3) the new wall thermostat is smaller than the old unit and was installed off-set, leaving a visible hole in the wall that I now need to patch (is leaving holes in walls usually left to the homeowner to fix?).
All comments greatly appreciated.