"AKA gray asphalt" wrote in message
...
Our house ac compressor was replaced today. The guys sold me a SER13 3.5
ton American Standard to replace a 3.5 ton Carrier about 10 years old. The
new unit is much bigger. Someone told me that it wasn't good to replace a
10 SER with a 13 SER because the coil would have to be replaced and at
least the orifices would need work/ or was it replacement. But he said
that if the installers knew what they were doing, he would guess that they
could make it work.

The AC has been running for 5 hours and won't cool below 75 degrees on a
pretty cool day. Google says it's 84F now here in the desert.

Is an orifice or coil problem going to show us as an inability to cool or
do good readings on the guages outside on a ground level of a split A/C
furnace tell the installer everything he needs to know? Any ideas what
might be wrong? He's comming back later today and I want to be able to ask
a few good questions, if possible.

My mother had her 20 yr old a/c unit in Florida replaced and the new unit
was
also much larger. Installer said that all the newer non-freon designs were
bigger units. I dunno.

The number one thing you need to find out is the temperature of the air
coming out of the registers. If it's 60 degF or less, then your problem is
more than likely air flow related (clogged filter, open pipe in the attic,
dirty fins, etc., etc.). If the air temp is in the upper 60's or warmer
then
the problem is likely related to your new compressor and/or its
installation.