Or just put in a deadband, that's what most thermostats do. Also, you should note that most of them also don't show the exact temperature in the room... it's a

Or just put in a deadband, that's what most thermostats do. Also, you should note that most of them also don't show the exact temperature in the room... it's an algorithm. Your furnace might heat to 68 on the display but the actual temp may be between 67 and 69, but if your display temp constantly bounced it would result in mass consumer disappointment.