ON
OFF
ON
OFF
5 6
ST E P 1
Power o your Heating, Ventilation, and Air Conditioning
(HVAC) system by using the master sw itch or circuit
breaker b ox. This is im port ant for your safet y.
TIP: Look for your mast er sw itch or circuit b reaker b ox in the b asement, attic,
ut ilit y closet , or b ehind a w all p anel near the t herm ost at .
TIP: If you have a boiler, check t o see t hat t he m ain am e is ext ing uished .
ST E P 2
Con rm your system is o by t urning on your heat (during
wint er) or your AC (during summer). Wait a few minutes—
you should not feel air com ing from your vent s.