Honeywell T8131C Owner's Manual page 14

To remove the batteries, press down on the left
ends of the batteries. If you insert new batteries
within 20 to 30 seconds of removing the old
ones, the thermostat does not require repro-
gramming. However, if the display is blank, the
batteries are dead or incorrectly installed and
the thermostat requires reprogramming.
• Install the fresh batteries, as shown, making
sure positive and negative terminals are
oriented correctly.
• Replace the battery door.
• Replace the batteries once a year to assure
memory retention if ac power is lost.
14
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
POWER
M9203
69-0908—1