On Sat, 22 Nov 2008 08:42:45 -0800 (PST), Mikepier
wrote:

When I do that, the display slowly get dim almost to a point i can't
see it anymore, probably from the internal battery to retain
programming memory. So what does that mean?


The light is dimming slowly because there is a capcitor in the
thermostat that acts like a battery. Because your thermostat is
dimming when you remove the batteries it is most definetly not a power
stealing thermostat. You need to get a thermostat that is a power
stealing one (one that has a common connection, or "c" terminal). Why
are you using a remote sensor anyway? Check this out:

http://www.wirelessthermostats.com/

http://www.google.com/search?aq=f&so...ess+thermostat