Hi all, I'm not sure I have the same thermostat, but I keep getting the message about having your system checked, even after taking out the batteries! Whare is this NO button? The only button that speaks on mine is the one at the bottom left, wich announces the tempature. When I first got it, it would speak the settings as I arrowed up and down, but it doesn't do that anymore! Non of the buttons under the flip down cover speak! 73: John John Jacques Amateur Radio Station: KD8PC "Where Cat Is, Is Civilization!"