"jas kim" wrote in message
While
it cools adequetely, it seems to stay on all the time. Ie it does not
cycle on or off like a normal A/C when it is set at any temperature
below 77 degrees. The fact that it stays on continuously concerns me
as I suspect that this will ultimately affect its useful life.


Not being satisfied, I went down the street and noted that the A/C
units that were used in an exact house like mine from the same builder
were a bit bigger and more efficient.

The slightly larger size should not make a huge difference. The upstairs
unit will run longer as there is a greater heat load from the sun on the
roof.

Running longer will also dehumidify better. Thee is such a thing as having
too large of a unit. To determine if yours is correct, you'd have to run a
Manual J check to determine the load. The builder may have the information
you need.

You can also ask for information an alt.hvac