We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

On Wed, 12 Oct 2011 17:59:03 -0700 (PDT), hrricane34
wrote:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

The wall cavity can interfere with the T-stat.

Look behind the T-stat mount (remove). Seal the hole the wire passes
through. Fix a large hole. Some wires are passed through the wall with
a hammer-head sized hole.

Close it up and check again. In the desert it made a difference for me
how the T-stat operated.

hrricane34 wrote:
We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Where is the thermostat located?? Is it on an interior wall? Is it
near a stairwell? It's location can make a big difference as well as
the effect of the mounting area. I had a situation where my thermostat
was above a stairwell, and moving it some 8 feet made a world of
difference in the regulated temperature upstairs.

hrricane34 wrote:
We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?
Hmmm,
Remove the 'stat off the wall and let it dangle away from the wall.
It'll prove on your idea. Mine is wireless, I can place it any where
in the house. Usually I locate it upstairs in summer and down stairs
in winter.

hrricane34 writes:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Check near the thermostat with incense or a piece of lit rope.
Anything that makes smoke. Might as well just take it down and
seal the holes the wires come out of.

Opening a window will change room pressure to outside pressure
possibly changing air flows in the house.

--
Dan Espen

On Oct 12, 7:59*pm, hrricane34 wrote:
We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

With the room set up so that the thermostat doesn't seem to be
registering the actual room temperature, wave a large piece of
cardboard in the vicinity of the thermostat so that the moving air
goes around the thermostat. Maybe the air in the room is stratified
and unless there is a door or window open, the air simply does not
move enough to get into the inside of the thermostat where the sensor
is located and cause it to be correct.

On Oct 12, 10:24*pm, "hr(bob) "
wrote:
On Oct 12, 7:59*pm, hrricane34 wrote:





We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

With the room set up so that the thermostat doesn't seem to be
registering the actual room temperature, wave a large piece of
cardboard in the vicinity of the thermostat so that the moving air
goes around the thermostat. *Maybe the air in the room is stratified
and unless there is a door or window open, the air simply does not
move enough to get into the inside of the thermostat where the sensor
is located and cause it to be correct.- Hide quoted text -

- Show quoted text -

Is it reading higher than actual or lower and by how much? Hard to
imagine it would not change at all in response to changing room temp
with the windows closed. Are you saying it can actually be 80 in the
room and it reads 72, then
suddenly changes to the correct 80 when you crack a window
open? Has it always been this way or is this something new?

As others have pointed out, if there is a hole in the wall
behind the thermostat that allows a draft from the wall
to occur, that can affect the thermostat. But this would
be an extreme case of that occuring.

On Oct 12, 7:59*pm, hrricane34 wrote:
We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Some thermostats do what I think you are describing on purpose. They
sense a small temperature change, turn on your heating or cooling, and
the display will say always say the same temperature, as long as it
doesn't drift more than a few degrees. It is a little tick to make
you think the thermostat is working better than it really is. I know
that Honeywell Vision Pro stats do this. Others probably do this too.

On Oct 13, 10:27*pm, wrote:
On Oct 12, 7:59*pm, hrricane34 wrote:





We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Some thermostats do what I think you are describing on purpose. *They
sense a small temperature change, turn on your heating or cooling, and
the display will say always say the same temperature, as long as it
doesn't drift more than a few degrees. *It is a little tick to make
you think the thermostat is working better than it really is. *I know
that Honeywell Vision Pro stats do this. *Others probably do this too.- Hide quoted text -

- Show quoted text -

I have several VisonPros here and they do no such thing.
If the room temp drops a degree or two they show it. Also, how would
you explain that the thermostat does in fact change
as soon as he cracks a window and then settles at room
temperature?

On Oct 14, 6:09*am, "
wrote:
On Oct 13, 10:27*pm, wrote:





On Oct 12, 7:59*pm, hrricane34 wrote:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Some thermostats do what I think you are describing on purpose. *They
sense a small temperature change, turn on your heating or cooling, and
the display will say always say the same temperature, as long as it
doesn't drift more than a few degrees. *It is a little tick to make
you think the thermostat is working better than it really is. *I know
that Honeywell Vision Pro stats do this. *Others probably do this too..- Hide quoted text -

- Show quoted text -

I have several VisonPros here and they do no such thing.
If the room temp drops a degree or two they show it. *Also, how would
you explain that the thermostat does in fact change
as soon as he cracks a window and then settles at room
temperature?

Some thermostats (Vision Pro and others) do indeed round the displayed
temperature to the setpoint temperature if it is only a couple of
degrees off. Most people would never notice this and Honeywell
doesn't print this in the owner's booklet, but they will tell you if
you call them and ask them about it.
My guess would be that they are programmed to not show the temperature
change if it happens slowly and it thinks it can recover in a
reasonable amount of times, but if it happens quickly it will show the
actual temperature.

On Oct 14, 7:43*am, wrote:
On Oct 14, 6:09*am, "
wrote:





On Oct 13, 10:27*pm, wrote:

On Oct 12, 7:59*pm, hrricane34 wrote:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Some thermostats do what I think you are describing on purpose. *They
sense a small temperature change, turn on your heating or cooling, and
the display will say always say the same temperature, as long as it
doesn't drift more than a few degrees. *It is a little tick to make
you think the thermostat is working better than it really is. *I know
that Honeywell Vision Pro stats do this. *Others probably do this too.- Hide quoted text -

- Show quoted text -

I have several VisonPros here and they do no such thing.
If the room temp drops a degree or two they show it. *Also, how would
you explain that the thermostat does in fact change
as soon as he cracks a window and then settles at room
temperature?

Some thermostats (Vision Pro and others) do indeed round the displayed
temperature to the setpoint temperature if it is only a couple of
degrees off. *

Nonsense. Have 3 of them here and they respond fully
to the actual room temperature as measured by other
devices. Temp gioes up by 1 deg, my VisionPros show it.
They are one of the most popular high-end thermostats
and if they didn't show the actual room temp to within a
degree or so, I'm sure we'd be hearing about it.



Most people would never notice this

I would

and Honeywell
doesn't print this in the owner's booklet, but they will tell you if
you call them and ask them about it.

I've found their customer service to be abysmal. For one
thing, if you're not a dealer they won't even answer an
install question. They told me I have to have an installer
come over if I want to change a parameter. Makes me not want to buy
another Honeywell product

My guess would be that they are programmed to not show the temperature
change if it happens slowly and it thinks it can recover in a
reasonable amount of times, but if it happens quickly it will show the
actual temperature.- Hide quoted text -

- Show quoted text -

Assuming they do behave as you describe, then why
when the OP cracks a window do they suddenly behave
differently?

On Wed, 12 Oct 2011 17:59:03 -0700 (PDT), hrricane34
wrote:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp.

Does it go up or down?. I don't have a handle on what is happening.

But it sounds like the display numbers are stuck and need a push from
t he outside air. Best to oil the numbers every year.

? Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

On Fri, 14 Oct 2011 05:55:10 -0700 (PDT), "
wrote:

On Oct 14, 7:43*am, wrote:
On Oct 14, 6:09*am, "
wrote:





On Oct 13, 10:27*pm, wrote:

On Oct 12, 7:59*pm, hrricane34 wrote:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Some thermostats do what I think you are describing on purpose. *They
sense a small temperature change, turn on your heating or cooling, and
the display will say always say the same temperature, as long as it
doesn't drift more than a few degrees. *It is a little tick to make
you think the thermostat is working better than it really is. *I know
that Honeywell Vision Pro stats do this. *Others probably do this too.- Hide quoted text -

- Show quoted text -

I have several VisonPros here and they do no such thing.
If the room temp drops a degree or two they show it. *Also, how would
you explain that the thermostat does in fact change
as soon as he cracks a window and then settles at room
temperature?

Some thermostats (Vision Pro and others) do indeed round the displayed
temperature to the setpoint temperature if it is only a couple of
degrees off. *

Nonsense. Have 3 of them here and they respond fully
to the actual room temperature as measured by other
devices. Temp gioes up by 1 deg, my VisionPros show it.
They are one of the most popular high-end thermostats
and if they didn't show the actual room temp to within a
degree or so, I'm sure we'd be hearing about it.

We have 2 of these -- if the heating/cooling is off, or the actual
temperature is more than a couple degrees from the setpoint, it does
show the actual temperature accurately. But if on, it will "cheat" by
a degree -- if cooling to 73, it will let the actual temp go to 74,
still showing 73. If you bump the setpoint down or up, all of a
sudden it shows 74.

This has been documented as a design feature on HVAC forums, and I
think the installers manual even mentions it; I'll have to look at the
docs I got with our system. It allows the system to cycle properly,
while making people fawn over how great this thermostat is at keeping
the temperature right at the setpoint at all times :-)

Most people would never notice this

I would

I do notice that "73" doesn't always feel like 73. In the end, it's
not doing anything different than any other thermostat (all of them
allow a 1-2 degree hysteresis), just showing a different value.


and Honeywell
doesn't print this in the owner's booklet, but they will tell you if
you call them and ask them about it.

I've found their customer service to be abysmal. For one
thing, if you're not a dealer they won't even answer an
install question. They told me I have to have an installer
come over if I want to change a parameter. Makes me not want to buy
another Honeywell product

My guess would be that they are programmed to not show the temperature
change if it happens slowly and it thinks it can recover in a
reasonable amount of times, but if it happens quickly it will show the
actual temperature.- Hide quoted text -

- Show quoted text -

Assuming they do behave as you describe, then why
when the OP cracks a window do they suddenly behave
differently?

I'm not sure this has anything to do with the OP's observation if the
unit is "off" (which is how I read it when he says the temperature
itself is changing); when off our Honeywell tracks the temperature
accurately.

Josh

Would that be three in one, or WD-40?

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"micky" wrote in message
...


Does it go up or down?. I don't have a handle on what is
happening.

But it sounds like the display numbers are stuck and need a
push from
the outside air. Best to oil the numbers every year.

On Oct 12, 8:59*pm, hrricane34 wrote:
We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Drafty wall cavities, large hole behind the thermostat which is
effecting
the thermostat's readings...

It would be nice if all the wall cavities were sealed up in your house
but
that is not required in single family homes...

I would seriously worry in the event of a fire in your house, if it
gets into
the walls at all it will end up causing a lot more damage as if this
sort
if airflow can have a significant enough volume to effect your
thermostat
reading, it will literally suck the fire into the walls if you leave
the door
open in your hasty retreat for your life or after flash over in a room
breaks out the window...

~~ Evan

On Oct 15, 5:14*pm, Evan wrote:
On Oct 12, 8:59*pm, hrricane34 wrote:





We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Drafty wall cavities, large hole behind the thermostat which is
effecting
the thermostat's readings...

It would be nice if all the wall cavities were sealed up in your house
but
that is not required in single family homes...

I would seriously worry in the event of a fire in your house, if it
gets into
the walls at all it will end up causing a lot more damage as if this
sort
if airflow can have a significant enough volume to effect your
thermostat
reading, it will literally suck the fire into the walls if you leave
the door
open in your hasty retreat for your life or after flash over in a room
breaks out the window...

~~ Evan- Hide quoted text -

- Show quoted text -

Another example of a vivid imagination run amuck. I suppose
because the thermostat isn't reading correctly, for some unknown
reason, the whole house should be condemned.

On Sun, 16 Oct 2011 04:25:49 -0700 (PDT), "
wrote:

On Oct 15, 5:14Â*pm, Evan wrote:
On Oct 12, 8:59Â*pm, hrricane34 wrote:





We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). Â*But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. Â*Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Drafty wall cavities, large hole behind the thermostat which is
effecting
the thermostat's readings...

It would be nice if all the wall cavities were sealed up in your house
but
that is not required in single family homes...

I would seriously worry in the event of a fire in your house, if it
gets into
the walls at all it will end up causing a lot more damage as if this
sort
if airflow can have a significant enough volume to effect your
thermostat
reading, it will literally suck the fire into the walls if you leave
the door
open in your hasty retreat for your life or after flash over in a room
breaks out the window...

~~ Evan- Hide quoted text -

- Show quoted text -

Another example of a vivid imagination run amuck. I suppose
because the thermostat isn't reading correctly, for some unknown
reason, the whole house should be condemned.
Easy way to find out if there is anything to the "warm air in the
wall" arguemnrt. Unscrew the 'stat from the wall and see what happens.

On Oct 16, 3:36*pm, wrote:
On Sun, 16 Oct 2011 04:25:49 -0700 (PDT), "





wrote:
On Oct 15, 5:14*pm, Evan wrote:
On Oct 12, 8:59*pm, hrricane34 wrote:

We have a modern digital thermostat that we mainly use during the
summer months and we have noticed that if we have all the windows shut
then the temperature (on the thermostat) does not change as the
temperature of the room changes (we measured room temp independently
of the thermostat). *But the kicker is that if we open a window, even
only a couple of inches (just has to be one of them, not all) in the
house, the temperature on the thermostat would change quite rapidly
and then settle to the actual room temp. *Also note that the outside
air is not any cooler than the current inside temp.

Based on an internet search all we could come up with is to insulate
the area inside the wall where the thermostat is located since they
seem to think that there is warm air blowing within the walls, but I'm
not sure why opening a window would cause warm air to escape in
between the walls behind the thermostat.

Does anyone have any other ideas as to why the temp only changes when
we open a window?

Drafty wall cavities, large hole behind the thermostat which is
effecting
the thermostat's readings...

It would be nice if all the wall cavities were sealed up in your house
but
that is not required in single family homes...

I would seriously worry in the event of a fire in your house, if it
gets into
the walls at all it will end up causing a lot more damage as if this
sort
if airflow can have a significant enough volume to effect your
thermostat
reading, it will literally suck the fire into the walls if you leave
the door
open in your hasty retreat for your life or after flash over in a room
breaks out the window...

~~ Evan- Hide quoted text -

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Another example of a vivid imagination run amuck. *I suppose
because the thermostat isn't reading correctly, for some unknown
reason, the whole house should be condemned.

* Easy way to find out if there is anything to the "warm air in the
wall" arguemnrt. Unscrew the 'stat from the wall and see what happens.- Hide quoted text -

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Yeah, that's one thing that could be tried. So much of this makes no
sense. Not much pertinent info given, ie how far off is the
thermostat from other thermostats? 1 deg? 5 deg? It also seems odd
that if
that's the problem that opening one window a bit suddenly
makes it read the correct room temp. You would think if
there were an air hole in the wall or something like that then
opening a window would probably make it worse.

And what happened to the OP?