Honeywell RTH6400 Manuel D’Utilisation
69-2210EF—03
ii
Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set your new thermostat to match your heating/cooling
system
– It is preset for the most common system
We are here to help.
Call 1-800-468-1502 for wiring
assistance before returning
the thermostat to the store.