Honeywell RTH7500 Thermostat User Manual


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RTH7400/RTH7500
17 69-1899EF—02
Battery replacement
Batteries are optional (to provide backup power) if
your thermostat was wired to run on AC power when
installed.
Install fresh batteries immediately when the LO BATT
warning begins flashing. The warning flashes about 30
days before batteries are depleted.
Evenifthewarningdoesnotappear,youshouldreplace
batteries once a year, or before leaving home for more
than a month.
Grasp thermostat and pull to
remove from wallplate
Insert 2 fresh AA alkaline batteries
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