Honeywell TH8110R1008/U User Manual page 19

Replacing outdoor sensor batteries
Replace batteries in your outdoor sensor
when a warning appears on the thermostat
screen, about 60 days before batteries are
depleted.
To replace the batteries:
1 Remove the sensor from the bracket.
2 Detach cover.
3 Install 2 fresh AA lithium batteries.
4 Replace cover and set sensor back into
bracket.
The outdoor sensor will restore
communication with the thermostat a few
seconds after new batteries are installed.
Replacing indoor sensor batteries
Replace batteries in your indoor sensor
when a warning appears on the thermostat
screen, about 60 days before batteries
are depleted. When the sensor status
light begins flashing red, battery power is
critically low and will be depleted within 2–3
weeks. During normal operation, the status
light remains off.
To replace the batteries:
1 Remove the sensor from wallplate.
2 Install 2 fresh AAA alkaline batteries. If
the status light flashes green, batteries
are good; if it flashes red, you must use
fresh batteries.
3 Attach sensor to wallplate.
The sensor will restore communication with
the thermostat a few seconds after new
batteries are installed.
has low batteries
M32988A
has low batteries
17
Outdoor Sensor
Indoor Sensor
M32990A
69-2761EFS—03
MCR34145
MCR32937A
MCR34146
MCR32933