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Step 4. Attach back plate to wall
1. Gently remove the old thermostat base by unscrewing
it from the wall. Make sure the wires do not fall back
into the wall.
2. Position the back plate of your ecobee3 on your wall,
using the built-in level to make sure it’s straight. Mark
the mounting holes on your wall in pencil.
3. Drill mounting holes for the drywall anchors.
4. The back plate must be used with a trim plate. If the
smaller trim plate does not cover the marks left by the
previous thermostat, you can attach the larger trim
plate instead.
Remove the back plate by gently
pushing the back of its left side
towards you.
