Honeywell RTH7500 Manuel D’Utilisation

Use this feature in climates where both air conditioning and heating are used on the 
same day. When the system mode is in Auto, the thermostat automatically selects heating 
or cooling depending on the indoor temperature.
While in the Auto mode, if a schedule override takes place (temporarily or permanently) 
the thermostat will automatically adjust the cooling and heating settings to maintain a 
3-degree separation between the cool and heat settings.
For example, if the heat temperature is raised to where it gets within 3-dgrees of the cool 
setting, the display will show an up arrow next to “cool” to show the thermostat is raising 
the cool setting up to maintain a 3-dgreee separation.
The display will also show both “Auto” and either “Heat” or “Cool” for which temperature 
setting you are currently adjusting. Press the system button to select between the heat 
and cool to view/adjust either mode.