What should I know about using Auto Changeover mode on the RTH7600D?

Auto Changeover mode allows the thermostat to automatically switch between heating and cooling on the same day for climates that require both. However, you should not use Auto Changeover if the outside temperature drops below 50°F (10°C), as this can cause possible compressor damage. When a schedule override occurs in Auto mode, the thermostat automatically maintains a 3-degree separation between heat and cool settings.