8
Step 1. Power o your HVAC system
Before doing anything else, power o your system. If your
HVAC equipment doesn’t have a master switch, go to your
circuit breaker box and turn o the breaker.
Verify that the equipment is o by attempting to
adjust the temperature at your existing thermostat. The
thermostat will show the temperature change but your
cooling or heating should not come on.
Power o your system either
using the master switch or at
the circuit breaker box.
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