Removing Your Existing Thermostat - Honeywell Lyric Installation Manual

Remove your existing thermostat
1
Switch off the power
system at the circuit breaker box or at the system switch
or on your heating and/or cooling unit.
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to your heating and/or cooling
listen
feel
2
Verify the power is off. Go to your thermostat and try
increasing or decreasing the temperature. Many digital
thermostats are battery powered, which makes it difficult
to tell if the power is off. Listen to ensure your system is
turned off before continuing.
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3