On Tue, 25 Jul 2006 16:48:44 GMT, "JoeSpareBedroom"
There are other factors with the lenth of operation of your AC unit.
1. How well is your house insulated (your walls)?
2. How tight is your house against drafts?
3. Is your AC Unit in direct Sun?
4. What is "Checked" by your happy company?
5. Have you checked for any blockage around the ouside unit?
6. Is my air filter dirty.
These are just some questions I would ask myself, when trying to
determine the health of an ac unit.
Personally, I purchased a couple dial indicating temperature probes,
and inserted them into the return, and supply of my furnace/AC coil. I
check from time to time for the differencial temp. If you have a
differencial temp, to tell us, we might have better insite. Your AC
might be working very hard, and have an undersized blower unit to cool
tom @ www.WorkAtHomePlans.com
#1: Wall insulation unknown. Built in 1956, upstate NY, so probably some
insulation, but not much. All non-destructive inspection methods known to
man have been attempted, and failed. But, I'll be doing a couple of
plaster-shattering projects soon, and will have a real answer. And, new
siding comes next year, along with the customary outside insulation.
#3: AC unit's in sun only for the first 2 hours in the morning. Total shade
after 9:00 AM or so.
#4: "Checked" in this case meant outside unit cleaned, refrigerant level
checked & adjusted (needed very little).
#5: No blockage outside. Very easy to keep clear.
#6: Air filter is clean. Installed badly by previous contractor (along with
a number of other things). It's the accordion type, and it binds badly as it
goes into the duct, so checking it is not as easy as with a flat filter. I
may have the filter system changed.
At the age of this unit, it's probably time to clean the evaporator
coils. I had a similar situation here in north Texas. A 17-year-old
2-ton unit on the west side of the house, SEER 10.
Today it was replaced with a 2.5-ton unit, SEER 13. The old evap coil
was 1/3 blocked with wet dust. The lower 2/3 I had been able to clean
with a can of foaming coil cleaner. It looked clean from the side that
I could access but the far side told a different story.
Coil cleaning is not an annual checkup item and typically runs about
$200+ when done professionally, but it would make a world of
difference if the unit was otherwise sound.
On Sat, 05 Aug 2006 15:47:10 GMT, "JoeSpareBedroom"
Since your replies seem to imply the unit is operating as designed (i
forgot to ask about evap coil being check), maybe the unit is
undersized for the house.
Sorry, it sounds like you need a technician on site.
Yeah...I get the same feeling. Luckily, the company I use will send out the
owner to survey the house for a possible replacement, but without a huge
pain in the ass sales pitch. Just "Here's the right unit, call when you're
ready. Doin' any fishin'?" Pleasant people. And, when the furnace needed
service last winter, the tech arrived in sloppy, snow covered shoes, removed
them, and pulled a dry pair out of his tool bag. WTF? Who does that these
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