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.