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furnace keeps cycling every 6 to 8 minutes or so

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OhioGuy

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Oct 20, 2008, 2:13:26 PM10/20/08
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Our gas furnace seems to be turning on and off rather often - like
every 6-8 minutes. It is doing a fine job of heating the place, but
that's just the problem - it seems like it is too "fine" tuned. It
isn't letting the temperature vary more than a tenth of a degree, or at
least that is what it seems like.


Before assuming it is something about the furnace itself, I realized
that our thermostat is about 12 years old. Since thermostats are
usually 80 bucks or less, I should probably consider replacing that as a
first step, to see if it makes any difference.

I want a thermostat where I can adjust the delay a bit, and
especially where I can set it so that it isn't trying to keep the temp
at as narrow a range. Currently, when our furnace comes on, the temp
doesn't even go up a single degree before it turns back off. I would
much prefer that it went up 3 degrees or something before turning off,
and then the furnace not come on and off so much. It would be fantastic
if I could set a temp to trigger the furnace on, and a different temp to
kick it off.

Can anyone suggest a thermostat that has features like this? Thanks!

Vic Smith

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Oct 20, 2008, 2:23:17 PM10/20/08
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You might have an adjustment on your current thermostat for lag, or
whatever the term.
I think my fairly recent Honeywell is supposed to allow 3 degrees and
though I set it to the max, it really only has a 2 degree variance.
Which is okay, because that's a pretty comfortable variance.
Check the specs before you buy.
Honeywell has viewable specs and reviews on the web.
I think I saw reviews on the Amazon site.

--Vic

Rick

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Oct 20, 2008, 2:42:28 PM10/20/08
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I would definitely change the thermostat soon. I haven't seen many
(in fact I can't remember any at the moment) that you can adjust the
lag time or lag temp.

Some of the digital ones come with a warranty. I would buy at a local
hardware store as you can probably get better service and knowledge of
your problem then a chain store. It may cost a little more
initially. However, you would be able to talk to a real human by name
and not worry about them running off or pushing to a 1-800-no-help-
here line.

Just my $0.02

Regards,

Rick Boesen
Olivet, MI
www.FiberArtFest.com
www.QuesoCabezaFarm.com

clams_casino

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Oct 20, 2008, 2:46:01 PM10/20/08
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OhioGuy wrote:


Most any programmable thermostat should have such built into their
program. Both my Robertshaw & Honeywell thermostats have it.

j.ber...@valley.net

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Oct 20, 2008, 3:08:30 PM10/20/08
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Check the high limit cutout setting, sometimes that assembly gets
sticky.

On Mon, 20 Oct 2008 14:13:26 -0400, OhioGuy <no...@none.net> wrote:

* *
Anything being cooked a second time needs a hot oven.

Rod Speed

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Oct 20, 2008, 3:25:15 PM10/20/08
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Was that before or after you replaced the furnace ?

Vic Smith

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Oct 20, 2008, 3:27:31 PM10/20/08
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On Mon, 20 Oct 2008 14:13:26 -0400, OhioGuy <no...@none.net> wrote:

Looking around a bit it seems adjustable swing thermostats are
limited.
Might have to do with "standards."
http://www.energystar.gov/ia/partners/prod_development/revisions/downloads/thermostats/Proposal_PT.pdf

You might have a problem finding a thermostat you can adjust, since
the "standard" seems to be a fixed 2 degree swing minimum.
One other thing - you should ensure your thermostat is properly
located. If it's located out of drafts at a point where there is the
least loss of heat, it should cycle less frequently.
Of course the temp swing in outlying areas will be greater.

--Vic


Gordon

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Oct 20, 2008, 6:18:31 PM10/20/08
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OhioGuy <no...@none.net> wrote in news:gdihos$pj6$1...@aioe.org:

See if your Thermostat has an internal adjustment for anticipation.
Then turn it down. The anticipation adjustment is a small heater
in the thermostat that heats it internally. The idea being that
it will turn off quicker. Without anticipation, you would be
seeing very big temperature swings.

So. Before your go out and change the thermostat, see if
you can adjust it first.

Cheapo Groovo

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Oct 27, 2008, 5:47:53 PM10/27/08
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