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21 69-2809EF—03
Installing your thermostat
8 Switch heating/cooling system ON.
Important!
8a Verify that the C wire is
connected at the thermostat and
at the heating/cooling system.
8b Make sure the heating/cooling
system door is firmly secured.
8c Switch power back ON for your
heating/cooling system at the
breaker box or its power switch.
M31544
or
Circuit
breaker
box
Heating/cooling
system power
switch
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