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5
3. REMOVING OLD THERMOSTAT
3.1 Turn off power
To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker box, or by flipping
a switch at the air handler. Do not restore power until installation is complete.
WARNING
!
To ensure the power to your heating and cooling system has been turned off, try to turn on heating or cooling by
changing the temperature on your old thermostat.
or
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