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1. Turn o your HVAC system
WARNING: For your safety, you must turn o your HVAC system before removing your old thermostat.
Every HVAC system is dierent, but usually you turn o a master switch or switch the system o in your home’s breaker
box. [Figure 1.1]
Note: The master switch or breaker box is often found in your basement, attic, garage, or utility closet.
Removing Your Old Thermostat
Confirm that the HVAC system is turned o by adjusting the temperature on the thermostat, waiting a few minutes, and
making sure that the HVAC does not turn on.
TURN OFF
Figure 1.1
Breaker Box
Switch
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