10
1. Look at the wires coming out of the wall. Take a
picture for reference.
2. Using the old thermostat base as a guide, label each
wire going into your old thermostat with the provided
stickers.
3. If you have used the wire label C, please skip step 3
and proceed directly to step 4. If you have NOT used
the wire label C, proceed to Step 3: Install Power
Extender Kit (PEK).
Discard any jumper wires
between Rh, Rc, or R. Your
ecobee3 does not need them.
Tip:
If the wires have completely different labels, please
call ecobee support to help with wiring.
R
C
R
H
G Y W C
