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15
W C G Y R
Control Board
W
R
G
Y
Step 1. Find the HVAC terminals
Find the control board of your HVAC system. Open your HVAC system’s
cover and take a picture of the wires connected to the terminals of your old
thermostat. You may need to reference this photo later.
To thermostat
Step 2.
Label the wires
Label only the wires from the control board to your old thermostat with the
tags provided
(label 2 control board)
.
W C G Y R
HVAC
Control Board
→
→
W C G Y R
Label 1.
Label 2.
Thermostat
If you have a C
wire, you will not
need the label 2
below.
Control board
C
C
RC
RC
RC
RC
RH
RH
R
R
C
C
S
S
G
G
R
R
RC
RC
RH
RH Y2
Y2
Y/Y1
Y/Y1
Y/Y1
Y/Y1
W/W1 W/W1
W/W1 W/W1
W2
W2
O/B
O/B
*
*
G
G