Step 6. Mount the thermostat
Step 7. Install the batteries
Align the tabs at the top of the thermostat with the tabs at the
top of the mounting plate (Fig. 11).
Press the lower edge of the case to latch the bottom of the
thermostat (Fig. 12).
IMPORTANT: Batteries must be installed for programming and
operation of the thermostat and heating/cooling system.
Honeywell recommends using Energizer® batteries.
Make sure that the System switch is set in the OFF position.
Using a coin, open the battery door as shown in Fig. 13.
Install the batteries.
Make sure that the positive and negative terminals are oriented
correctly as marked inside the battery case.
Replace the battery door.
Remove the clear plastic label from the digital display.
Check your progress
When the batteries are installed correctly, the digital display flashes
all entries once, then begins to flash a default time and the current
temperature (Fig. 14). The flashing continues until you begin to
program the thermostat.
You are now ready to program the thermostat. Go to page 12.