Re: new HVAC not cooling

thewifeunit@xxxxxxxxx wrote:
We recently had a contractor install a new unit (a Bryant Puron 2.5
ton in a 1500sq/ft 3br/2ba home) a couple of months ago. This week
we've had some really warm weather with temperatures in the 90s
nearing 100 degrees. The problem is the unit is not cooling the house.
The unit runs all day and doesn't drop the temperature below 78
degrees. Our older unit never had this problem.

We called the contractor that installed the unit out and he said that
was normal. He told us that these units won't cool more than 20
degrees below the ambient air temperature. He also said that the fact
that our ducts are in the celing makes this problem worse. Something
doesn't sound right here. I mean, our old unit cooled the house fine
and that unit was smaller (2 ton).

What's going on here? Is he correct, ignorant or simply lying? Can you
guys educate me on this? Should this unit be capable of cooling the
house better than it's doing now?

I'm in Texas. It's hot here. My house is bigger than yours, and 3 tons
will cool it as low as I want to go.

The "20 degree" rule of thumb is across the A/C. So if your house is
at 100 degrees, the A/C should be able to blow (more or less -- it's
just a rule of thumb, not Gospel) 80 degrees. Then, once the house is
cooled down to 80 degrees, it should be able to blow 60 degrees. Etc.

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