What happens when the batteries go dead?
The thermostat will provide a 1 to 2 month warning (display will show “bAt Lo”) before the batteries go dead. Once the batteries go completely dead, the display will be blank and the thermostat will not operate the heating and/or cooling system. Replacing the batteries once a year should prevent the heating/cooling system from shutting down due to lack of battery power. • What is the purpose of the fan operation switch? The thermostat fan operation switch, labeled FUEL SWITCH in the diagram below, is factory-set in the “F” position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to “E”. The “E” setting will allow the fan to turn on immediately with the heating or cooling in a system where the G terminal is connected. Note: On some electric furnaces, the furnace itself controls the fan. In this case, the switch can be left in the F position. Consult your furnace manufacturer or contractor to determine the fan operation if you are
