Removal Of Your Old Thermostat; Removing Old Thermostat - White Rodgers NP110 Install Manual

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.
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
WARNING
!
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