Installation Is Easy - Honeywell RTH6400 Series Quick Installation Manual

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
69-2210EF—03
We are here to help.
Call 1-800-468-1502 for wiring
assistance before returning
the thermostat to the store.
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