Installing Or Replacing The Batteries - Carrier Comfort Series Owner's Manual

OPERATING THE THERMOSTAT

Installing or replacing the batteries

You can install batteries in your thermostat so that if the power goes out, the
display will still show the indoor temperature.
In some situations, batteries are also the power source. Then, two AA batteries
should last about one year. When the batteries have lost about one−third of their
power, a battery icon appears on the display. Two−thirds of it will be black. As
the batteries get weaker, the icon goes down to one black bar and then none.
When the icon is empty, you will begin to lose thermostat functions when it is
battery powered. When the batteries are completely dead, you won't be able to
use the thermostat.
When using batteries for power, we recommend that you replace the batteries at
the one bar level with two AA alkaline batteries. They're in the back of the
thermostat, so you'll have to remove it from the wall.
Here's how to both install and replace batteries.
1. Locate the latch at the top of the thermostat. It's at the
center of the top rim.
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