This is Turtle.
Here is something to look at and why it went this away.
I had a 4 ton 13 seer Goodman condenser and a Arcoaire 5 ton evaperator coil
expanion valve with Arcoaire 100k gas furnace set up in my house. I had run it
for about 6 or 7 years or so and out of the blue the piston Compressor bite the
dirty. I changed out the condenser to a 3.5 ton 8 seer second hand 1982 Rheem
condenser till i could get time to get me a matching condenser Ordered at the
warehouse. this part of the country no body wants anything above 10 seer and the
warehouses don't carry much in the line of 13 or 14 seer.
So i was running a Goodman 13 seer 4 ton condenser and a Arcoaire 5 ton expanion
valve evaperator valve type and 5 ton blower gas Arcoaire furnace in the
beginning. I was getting about at the time the highest electric bill of $200.00.
Then I just put a 3.5 ton 1982 second hand condenser in the place of the 4 ton
13 seer goodman condenser units and my electric bill dropped down by $50.00 or
so. The highest electric bill that year was $150.00 and so has been the case for
a couple of years now.
So Why did my cost to operate drop when i only changed out a Goodman 4 ton 13
seer condenser unit to a Rheem 3.5 ton 8 seer condenser unit ? How does going
from a 13 SEER to a 8 SEER save money ? This does not seem right here.
Dear Hard Shelled One,
I had a read through your post a couple times. Also glanced through
Darryl's answer. Darryl is a wise man, and well worth the time to read his
As you mentioned that you are using a TXV coil. It make me wonder if you
were only using about 3.5 tons of cooling and the bigger compressor wasn't
doing much more cooling.
However, perhaps I may be of some service. I got my first couple years
of experience working on window unit, or PTAC. The thing I learned good and
clear is that window shakers suffer greatly from low air flow through the
I suspect your difference was air flow through the condnsor, and also
how clean were the fins. Heat transfer is everything, so I've found. Dirty
coils drive up the head pressure, and amperage.
You didn't say, but perhaps were the coils cleaner on the Rheem? Or
perhaps more surface area?
Turtle,I don't know the answer to your question about your bill, but
what I am wondering is why you didn't just change the compressor on the
Goodman. Even the 12 SEER have a 10 year warranty, and they don't even
charge any shipping/handling fees like most of the others do.
This is Turtle.
the goodman 13 seer condenser was a 1992 model and only had 5 year warranty on
it but in 1994 they started the 10 year compressor warranty. The first of the 12
and 13 seer condenser was 5 years and then in 1994 went to 10 years. I just
bought a 13 high seer too soon before warranty had cought up with them. There
was a problem with the Rheem warehouse getting a 13 seer in 1992.
i bought too early.
This is Turtle.
Stormy , I clean my coils every year and keep up with it pretty well.
And no the compressor was not inefficent for it will run a 400+ psi on the head
with the cond. fan shut off. It just put a 8 seer in a 13 seer place and cut
cost to operate a great bit. It does not add up.
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