Set Fan and System Switches
The switches on the bottom of the thermostat faceplate control the operation of your fan and the heating and cooling
system. Set the Fan switch first and then set the System switch.
As the batteries run low, your thermostat shows the following in the digital display:
If you see:
Flashing "bAt Lo"
a. Make sure that the System switch is set to the OFF position.
b. Open the battery door.
Press on the left side of the batteries to remove them.
If new batteries are inserted within 20-30 seconds of removing old ones, reprogramming is not
needed. If display is blank, batteries are dead or incorrectly installed and reprogramming is needed.
A single-speed fan turns on automatically with the air conditioner or furnace.
A two-speed fan usually runs on high with the air conditioner and on low with the furnace.
Auto is the normal setting for most homes.
The fan runs continuously. Use this setting for improved air circulation during special
occasions or for more efficient air cleaning.
In a heat-only system, the fan runs continuously only if the fan wire has been con-
nected to the G terminal on the back of the thermostat.
The thermostat controls your air conditioning system.
Both the heating and air conditioning systems are off.
The thermostat controls your heating system.
Replace the batteries as soon as possible, within the month.
Replace the batteries immediately. Your heating/cooling system is not