Step 1
Lift the front cover of the thermostat upward.
Step 2
Push the battery release latch inward and upward to remove the battery housing unit cover. Press the battery release lever downward. The batteries will pop out of the thermostat.
Step 3
Insert two AA 1.5-volt batteries. Follow the +/- directions on the battery housing unit for proper placement.
Step 4
Slide the battery housing unit cover over the batteries and back into position. Lower the front cover of the thermostat unit.