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1� Holds 2 “AA” Batteries�
2� HE/HG Switch - allows you to set your furnace to Gas/Oil or Electric, based
on the type of system you have�
3� Allows your thermostat to operate your HVAC system* properly by indicating
the system type that you have�
*Conventional System: Uses a condensing unit for cooling and a
separate furnace system for heating�
*Heat Pump System: Uses the condensing unit for both heating
and cooling�
NOTE: If you are unsure of your system type it may be necessary to contact
your HVAC manufacturer, or a local HVAC technician to determine this�
Improper selection of your system type could cause the thermostat to
not operate your system properly�
Know Your Thermostat