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?