Honeywell T8112C Owner's Manual - Page 11

be reprogrammed. See Programming Your, incorrectly installed and the thermostat has

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Page 11 highlights

To remove batteries, press down on the left ends. If the new batteries are installed within 20 to 30 seconds of removing the old ones, the thermostat does not have to be reprogrammed. If the display is blank, the batteries are dead or incorrectly installed and the thermostat has to be reprogrammed. See Programming Your Thermostat section for instructions. 11 69-0862-4

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69-0862°4
To remove batteries, press down on the left
ends. If the new batteries are installed within 20
to 30 seconds of removing the old ones, the
thermostat does not have to be reprogrammed.
If the display is blank, the batteries are dead or
incorrectly installed and the thermostat has to
be reprogrammed. See Programming Your
Thermostat section for instructions.