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.