I bought a Rheem 3.5 ton unit about a year ago for my 1880 sq. ft.
house. Today it is 90 degrees outside and I can't get it below 73 in
the house. The AC has been running continuously for about 8 hours.
I've got it set to reach 72, but it can't get there. My old unit (~25
years old) that was replaced could cool the house to the mid 60's
pretty quickly. The new unit seems a lot less powerful. Does anyone
know if this is normal for the newer units, or does it sound like I've
got a problem?
Where are you, and what's the humidity like? That's the factor few
people consider. Humidity will really load down a system. Other
factor. Do you have a vestible or airlock? I've been to one house
where the system wasn't cooling. They were both smokers, and opened
the door for many seconds each time they stepped out to smoke.
If the problem continues, I'd call a repair company. Of course, they
will be rather busy now. By the time someone comes out, the weather
will be cooler, and you can guess the rest.
In this neck of the woods, an average house that size is only gonna need 3
tons. Long run times with a smaller, correctly installed system will freeze
your ass out at the 75F @ 50%RH I design for. You need to get somebody that
knows what they're doing to come check out the system. FWIW, if you got the
house down to the mid 60s, you were running an evap SST bordering on
freezing. I would also be willing to bet that you had to turn it down that
low because it had been grossly over charged. Your installer is an idiot.
Would you guess his old system had an expansion valve instead of a cap
tube or piston? I was in Johnstone the other day looking for a TXV for
a problem system that happened to be a Goodman. The counter guy pulled
a Goodman part numbered valve kit made by Sporlan that fit in place of
the metering piston on the Goodman evaporator. The only brazing needed
is to pick one of several T adapters from the kit to install on the
suction line on the evaporator. The T adapter has a 1/4 fitting for the
external equalizer tube from the TXV. The kit even includes a foam
rubber cozy to insulate the expansion valve. When me and the salesman
went through the kit and saw how versatile it was, I exclaimed "COOL!"
(no pun). There is a lot of stuff at the supply house that nobody knows
about unless you sit down and read their catalog like, um, every time
you visit the odoriferous reading room.
We get paid to make it as hot or cold as the customer wants and
can afford. Al Gore is busy getting his ass handed to him in a divorce
case and is too busy to haunt you if your comfort zone is beyond his
hypocritical standards. You are aware that his so-called green home eats
enough energy to power a small city.
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